Task: Program Execution
Input (English): 1, 2, ['3499', 'j', '3493', 'U', '9671', 'x', 'l', '6751', '6697', 'D', '2685', 'x', 'K', '3153', 'J', '5669', 'v', 'X', 'S', '3637', 'h', 'N']
Output (English): j9943