Task: Program Execution
Input (English): 21, 29, ['9883', 'L', '5535', '3169', 'r', '6791', 'u', '229', '2297', '8295', 'k', '8327', '6563', '3375', 'z', 'R', 'Q', 'u', 'V', '7645', 'r', '4299', 'x', 'R', 'i', 'Q', 'J', 'X', '6455']
Output (English): r4299xRiQJX6455