Task: Program Execution
Input (English): 15, 18, ['3799', 'l', '635', '5947', 'k', '903', '6377', '6433', 'E', 't', 'G', 'n', 'D', '2633', '4729', 'e', 'e', '6321', '671', 'L']
Output (English): 6321ee4729