Task: Program Execution
Input (English): 15, 23, ['9897', '6143', '3209', '673', 'C', '9797', 'a', 'i', '5865', '7797', 'P', 'w', 'f', 'Y', '3211', 'Z', 'j', '5605', '945', '3061', 'L', 'U', 'W', 'm']
Output (English): WUL30619455605jZ3211