Task: Program Execution
Input (English): 21, 23, ['1929', '5305', '7401', 'k', '3073', 'C', 'P', 'A', '3847', 'd', '8911', '7747', '9879', '1803', 'H', 'V', 'a', '7907', 'C', '5931', '3857', 's', 'N', 'e', 'A', '7279']
Output (English): N, s, 3857