Task: Program Execution
Input (English): 2, 15, ['9173', 'G', 'N', 'A', 'a', '3207', 'U', '1777', '6121', '7215', 'p', '4533', 'C', '8957', '467', 'm']
Output (English): GNAa3207U177761217215p4533C8957467