Task: Program Execution
Input (English): 21, 22, ['423', '5655', '2469', 'K', 'u', 'k', 'e', '453', 'D', 'x', '6559', 'c', 'P', 'U', '4255', '9755', 'r', '9287', '8897', 't', '3387', 'o']
Output (English): o7833