Task: Program Execution
Input (English): 3, 19, ['B', '6147', '7285', '3721', 'U', 'G', 'r', '4995', 'R', '7315', '5317', 'I', 'z', 'I', 'm', '5085', 'Q', 'Y', 'f', 'R', '1447', 's', '7873']
Output (English): fYQ5805mIzI71355137R5994rGU12735827