Task: Program Execution
Input (English): 19, 21, ['4839', '1971', 'H', 'x', 'a', 'u', '5453', '7519', '6575', 'H', '6533', 'U', '2901', '1401', 'W', '9749', 'l', 'X', 'q', '3481', '5295', 'B', '1065']
Output (English): q34815295