Task: Program Execution
Input (English): 3, 21, ['4979', '5243', '8481', 'I', '8819', 'P', '9195', '1721', 'J', 'D', '6113', 'A', '2497', 'F', '6007', 'J', '8457', 'F', '3909', '1993', '8105']
Output (English): 810519933909F8457J6007F2497A6113DJ17219195P8819I8481