Task: Program Execution
Input (English): 6, 15, ['7181', 'K', 'C', '9481', '3373', '7961', '1759', 'A', '4755', '1137', 'b', 'o', '7719', 'z', 'g', '2169', '3709', 'z', 'H', '4179', 'J']
Output (English): gz9177ob73115574A95711697