Task: Program Execution
Input (English): 18, 21, ['9479', '2917', '8123', '7389', 'L', 'H', '2187', 'J', '9519', '3553', '6873', '4177', 'c', '5393', '1611', 'Y', 'u', '5729', 'y', '8069', '6955', 'K', 'a', 'n', '6749', 'y', 'Z', '5327']
Output (English): 5729y80696955