Task: Program Execution
Input (English): 15, 20, ['O', 'y', 'U', '4317', '7553', 'j', '7407', '557', '6829', 'n', '3669', 't', '31', 'U', '2487', '9791', '8025', 'c', '4417', '199', 'S']
Output (English): 9917144c520819797842