Task: Program Execution
Input (English): 5, 20, ['e', 'x', '5541', 'D', '2241', '5507', '2225', '6871', 'l', 'f', 'K', 'C', '1787', 'v', 's', 'a', '5349', 't', '7069', 'a', 'J', 'k', '9879', '7389', '4775', '7257']
Output (English): a7069t5349asv1787CKfl6871222555072241