Task: Program Execution
Input (English): 15, 17, ['3539', 'x', 'l', 'n', '5183', 'x', '2675', 'i', '601', '6863', '4195', 'n', '8113', 'g', 'Y', '9961', '669', '4883', '5279']
Output (English): 6699961Y