Task: Program Execution
Input (English): 1, 15, ['z', '2795', 'M', 'o', '1853', 'r', 'U', '4279', '2771', '5619', '9709', '6543', 'M', '3357', '4967', '9377']
Output (English): 76947533M34569079916517729724Ur3581oM5972z