Task: Program Execution
Input (English): 15, 20, ['4979', 'O', '2473', 'y', 'M', 'n', 'j', 'y', 'v', '5877', '2533', 't', 'A', 'Q', 'X', 'X', '3915', 'R', 'n', 'c']
Output (English): X, X, 3915, R, n, c