Task: Program Execution
Input (English): 9, ['1841', 'u', '3841', '1689', '7085', 'U', 'v', '8205', 'Q', '3237', '623', 'v', '1369', 'i', 'T', '1777', '391', '9809', 'X', '5637']
Output (English): 1841, 3237, X