Task: Program Execution
Input (English): 10, 18, ['2115', 'P', '6709', 'R', 'y', 't', '7251', '7461', 'L', 'x', '8381', '7311', '4621', 'O', 'Z', 'b', 'N', 'N', 'M', '5045', '9169', 'P', 'e', 'N']
Output (English): x838173114621OZbNN