Task: Program Execution
Input (English): 4, 5, ['8067', '1773', '8027', 'x', '3877', '4271', 'x', '1775', '661', 'r', '1213', '2533', '6133', '5273', '615', 'v', '5367', 'u', '637', 's', 'W', 'X', 'L', 'V', '8563', '1879', '1355', 'x']
Output (English): x, 661, 5273, 637, V