Task: Program Execution
Input (English): 3, 15, ['X', '6555', 'q', '3999', 'x', '9453', 'Y', '781', '2697', '5763', '7765', 'p', '9581', 'z', '3051', 'E', '1779', 'e', '539', '9539', '3917', '2707', '897', '9027', '1115']
Output (English): 1503z1859p567736757962187Y3549x9993q