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i try my code but it's always wrong and print:

Expected: 'zzdqbis', got: 'zzdqbis' for input 'sibqdzz'
Expected: 'lfxhiqvxrlrxnmgkcqup', got: 'lfxhiqvxrlrxnmgkcqup' for input 'puqckgmnxrlrxvqihxfl'
Expected: 'xcvp', got: 'xcvp' for input 'pvcx'
Expected: 'vmmemljbjktl', got: 'vmmemljbjktl' for input 'ltkjbjlmemmv'
Expected: 'sppldbflmepdqsc', got: 'sppldbflmepdqsc' for input 'csqdpemlfbdlpps'


can somebody help me,please...

View the HTML source to the error response, and make sure you're not outputting any odd characters, e.g. the null terminator for the string.

thanks, got it.
there was an odd character...