使用Perl在目录中的所有文件中递归替换多个字符串

I'm new with perl. saw many samples but had problems composing a solution I have a list of strings which each string should be replaced in a different string a->a2, b->b34, etc. list of replacement is in some csv file. need to perform this replacement recursively on all files in directory. might be any other language just thought perl would be the quickestI'm new with perl. saw many samples but had pro