Task: Program Execution
Input (English): 7, ['j', '2877', '6149', '9233', '3915', '7349', '225', 'K', 'f', '2173', 'k', 'N', 'M', 'K', '5543', 'x', '3479', '2735', '53', 'J', 'z', '8137']
Output (English): j, K, 5543, 8137