Task: Program Execution
Input (English): 15, ['x', '7371', 'R', '2921', '8925', 'x', 'Y', '4223', 'f', 'I', 'H', '2711', 'x', '5831', 'I', 'U', '3227', '9041', 'S', 'x', 'N', 'w', 'o', 'v', 'Y', 'O', 'o', '7247', 'c', '547', 'E', 'n', 'E', 'k', 'T', '1031', 'R', 'J']
Output (English): x, U, E