Task: Program Execution
Input (English): 7, 15, ['5407', 'E', 'x', '2885', '4461', 'k', '8595', 'R', '2881', 'd', 'N', '4517', 'X', '3775', '1075', '8587', '8961', 'W', 'u', '4735', '9333', '689']
Output (English): 57015773X7154Nd1882R5958