Task: Program Execution
Input (English): 7, 21, ['9421', 'Q', '4849', '8137', '7871', 'S', 'd', 'U', '9411', 'p', '781', '4969', 'm', '5291', '5427', '5219', '1525', 'I', 'Y', 'e', 'N']
Output (English): NeYI1525521954275291m4969781p9411Ud