Task: Program Execution
Input (English): 13, 15, ['9973', 'm', 'H', '7575', '2305', 'n', 'S', 'E', 'P', '5463', '8057', 'x', '7237', 'X', '4063', '4061', 'H', 'D', 'N']
Output (English): 3604X7327