retorno boleto .ret

pessoal preciso ler o retono abaixo que o abnco me da um txt eu preciso pegar o nosso número q no caso fica no final disso aqui botei em negrito

02RETORNO01COBRANCA 823300008393 WEB SITE V MARKETING LTDA ME 341BANCO ITAU S.A.28091101600BPI00002290911 000001
10213331112000177823300008393 [b]013331112000177000000882300131958[/b] 176001319585 I06270911000013195800131958 280911000000002019010416113DM000000000000000000000000000000000000000000000000000000000000000000000000000000000000002019000000000000000000000000000 29091100000000000000000000000CAMILA NETO SOUZA ROCHA B5000002
10213331112000177823300008393 013331112000177000000882300132044 176001320443 I06270911000013204400132044 290911000000000309010431385DM000000000000000000000000000000000000000000000000000000000000000000000000000000000000000309000000000000000000000000000 29091100000000000000000000000KAMILLA DE FA-TIMA MAGALHA-ES B5000003
10213331112000177823300008393 013331112000177000000882300132103 176001321037 I06270911000013210300132103 290911000000000309910431385DM000000000000000000000000000000000000000000000000000000000000000000000000000000000000000309900000000000000000000000000 29091100000000000000000000000CLAUDINEIA RIBEIRO BARRETO B5000004
9201341 000000000000000000000000000000 000000000000000000000000000000 000000000000000000000000000000 0000010800000000471469 29/09S000020000000300000000026379 000005