Verificação de elementos em matrizes no Python

Verificação de elementos em matrizes no Python

Preciso de ajuda no seguinte caso:Tenho uma matriz 7x7. Na coluna do meio e na ltima linha desta matriz:matriz63 existe uma string A. Existem lasers representados pela string nas linhas de cima da matriz posicionados aleatoriamente que esto descendo linha a linha. A questo : se a string atingir a string A deve ocorrer uma exploso e ento as duas strings devem ser substitudas por outra:. Como posso fazer isso Um detalhe importante que no posso utilizar imports, dicionrios ou funes mais especficas do Python. Deve ser algo bem rstico mesmo. Valeu

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