Task: Program Execution
Input (English): 20, 21, ['4367', 'l', '2469', '3449', '4601', '4027', 'X', '9215', '473', 'O', 'y', 't', '4411', 's', 'M', '7973', 'l', 'K', '5413', 'f', '8735', 'j', 'Y', '8575', '6231', 'e']
Output (English): 8735