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    <link:label id="lab_ctt_RecebimentosEmDinheiroDeOutrosAtivosFinanceirosBancarios_documentation_pt" xlink:label="lab_ctt_RecebimentosEmDinheiroDeOutrosAtivosFinanceirosBancarios" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Recebimentos Em Dinheiro De Outros Ativos Financeiros Bancarios</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_RecebimentosEmDinheiroDeOutrosAtivosFinanceirosBancarios" xlink:href="002367-2022-12-31.xsd#ctt_RecebimentosEmDinheiroDeOutrosAtivosFinanceirosBancarios"/>
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    <link:label id="lab_ctt_GanhosPerdasEmInstrumentosFinanceirosAoValorJustoAtravesDeOutrosResultadosAbrangentes_documentation_pt" xlink:label="lab_ctt_GanhosPerdasEmInstrumentosFinanceirosAoValorJustoAtravesDeOutrosResultadosAbrangentes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Ganhos (Perdas) Em Instrumentos Financeiros Ao Valor Justo Atraves De Outros Resultados Abrangentes</link:label>
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    <link:label id="lab_ctt_PagamentosAClientesBancarios_documentation_pt" xlink:label="lab_ctt_PagamentosAClientesBancarios" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Pagamentos A Clientes Bancarios</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_PagamentosAClientesBancarios" xlink:to="lab_ctt_PagamentosAClientesBancarios" xlink:type="arc" order="1"/>
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    <link:label id="lab_ctt_DepreciacoesAmortizacoesEImparidadeDeInvestimentosPerdasReversoes_documentation_pt" xlink:label="lab_ctt_DepreciacoesAmortizacoesEImparidadeDeInvestimentosPerdasReversoes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Depreciações / Amortizações E Imparidade De Investimentos (Perdas/Reversões)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_DepreciacoesAmortizacoesEImparidadeDeInvestimentosPerdasReversoes" xlink:href="002367-2022-12-31.xsd#ctt_DepreciacoesAmortizacoesEImparidadeDeInvestimentosPerdasReversoes"/>
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    <link:label id="lab_ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao_documentation_pt" xlink:label="lab_ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aumento (Diminuicao) No Perimetro De Consolidacao</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao" xlink:href="002367-2022-12-31.xsd#ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao" xlink:to="lab_ctt_AumentoDiminuicaoNoPerimetroDeConsolidacao" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition_c4d6dd9a-0ad1-4be4-9bf8-3ac03c96404a_periodStartLabel_pt" xlink:label="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Caixa e equivalentes de caixa se diferentes da demonstração da posição financeira</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition_8c54bf8b-9c07-4de5-aacf-e11da5014a2d_periodEndLabel_pt" xlink:label="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Caixa e equivalentes de caixa se diferentes da demonstração da posição financeira</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:to="lab_ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_0c3cae23-2fc8-4120-8a1f-21a61820eae3_totalLabel_pt" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Fluxos de caixa de (utilizados em) atividades de exploração</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
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    <link:label id="lab_ctt_ProvisoesAumentosReversoes_documentation_pt" xlink:label="lab_ctt_ProvisoesAumentosReversoes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Provisões (Aumentos/Reversões)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_ProvisoesAumentosReversoes" xlink:href="002367-2022-12-31.xsd#ctt_ProvisoesAumentosReversoes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_ProvisoesAumentosReversoes" xlink:to="lab_ctt_ProvisoesAumentosReversoes" xlink:type="arc" order="1"/>
    <link:label id="lab_ctt_ImparidadeDeContasAReceberPerdasReversoes_label_pt" xlink:label="lab_ctt_ImparidadeDeContasAReceberPerdasReversoes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Imparidade De Contas A Receber (Perdas/Reversões)</link:label>
    <link:label id="lab_ctt_ImparidadeDeContasAReceberPerdasReversoes_documentation_pt" xlink:label="lab_ctt_ImparidadeDeContasAReceberPerdasReversoes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Imparidade De Contas A Receber (Perdas/Reversões)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_ImparidadeDeContasAReceberPerdasReversoes" xlink:href="002367-2022-12-31.xsd#ctt_ImparidadeDeContasAReceberPerdasReversoes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_ImparidadeDeContasAReceberPerdasReversoes" xlink:to="lab_ctt_ImparidadeDeContasAReceberPerdasReversoes" xlink:type="arc" order="1"/>
    <link:label id="lab_ctt_PagamentosEmDinheiroParaDepositosAVista_label_pt" xlink:label="lab_ctt_PagamentosEmDinheiroParaDepositosAVista" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Pagamentos em Dinheiro para Depositos a Vista</link:label>
    <link:label id="lab_ctt_PagamentosEmDinheiroParaDepositosAVista_documentation_pt" xlink:label="lab_ctt_PagamentosEmDinheiroParaDepositosAVista" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Pagamentos em Dinheiro para Depositos a Vista</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ctt_PagamentosEmDinheiroParaDepositosAVista" xlink:href="002367-2022-12-31.xsd#ctt_PagamentosEmDinheiroParaDepositosAVista"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_PagamentosEmDinheiroParaDepositosAVista" xlink:to="lab_ctt_PagamentosEmDinheiroParaDepositosAVista" xlink:type="arc" order="1"/>
    <link:label id="lab_ctt_Confirming_label_pt" xlink:label="lab_ctt_Confirming" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Confirming</link:label>
    <link:label id="lab_ctt_Confirming_documentation_pt" xlink:label="lab_ctt_Confirming" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Confirming</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ctt_Confirming" xlink:to="lab_ctt_Confirming" xlink:type="arc" order="1"/>
    <link:label id="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio_be84bb63-b5cd-4691-8a35-b7a61fa4934c_totalLabel_pt" xlink:label="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aumento (diminuição) por meio de outra transação, patrimônio</link:label>
    <link:label id="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio_label_pt" xlink:label="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aumento (Diminuição) Por Meio De Outra Transação, Patrimônio</link:label>
    <link:label id="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio_documentation_pt" xlink:label="lab_ctt_AumentoDiminuicaoPorMeioDeOutraTransacaoPatrimonio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aumento (Diminuição) Por Meio De Outra Transação, Patrimônio</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_18bcb151-4db4-4b74-9d77-37e7fac9fa5f_totalLabel_pt" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aumento (diminuição) de caixa e equivalentes de caixa antes do efeito das variações das taxas de câmbio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges"/>
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    <link:label id="lab_ctt_AplicacoesNoBancoCentral_documentation_pt" xlink:label="lab_ctt_AplicacoesNoBancoCentral" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Aplicações No Banco Central</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_7e6ea0da-5ad4-4fa5-b257-3b126c530a54_totalLabel_pt" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Fluxos de caixa de (utilizados em) atividades de investimento</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueAndOperatingIncome_df214dbe-6171-4991-8a37-2806932ab2a1_totalLabel_pt" xlink:label="lab_ifrs-full_RevenueAndOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Rendimentos e outros rendimentos operacionais</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueAndOperatingIncome" xlink:href="http://xbrl.ifrs.org/taxonomy/2021-03-24/full_ifrs/full_ifrs-cor_2021-03-24.xsd#ifrs-full_RevenueAndOperatingIncome"/>
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    <link:label id="lab_ctt_ReembolsosDeDepositos_label_pt" xlink:label="lab_ctt_ReembolsosDeDepositos" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Reembolsos De Depositos</link:label>
    <link:label id="lab_ctt_ReembolsosDeDepositos_documentation_pt" xlink:label="lab_ctt_ReembolsosDeDepositos" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="pt">Reembolsos De Depositos</link:label>
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