Task: Program Execution
Input (English): 20, 21, ['W', 'Q', '3517', '8673', 'v', 'w', 'd', 'O', 'h', '2489', 'g', '7399', '6805', 'D', 'q', '8621', 'z', '67', 'l', '2615', 'i', 'h', '5451']
Output (English): i5162