Task: Program Execution
Input (English): 20, 21, ['N', '5351', '7473', '8057', '969', '5125', 'Y', 'E', 'Y', '881', '8929', '307', 'e', 'H', 'z', '2619', '5747', 'g', 'G', '7503', 'K', '1843', '2893', 'H', 'D']
Output (English): 7503