Task: Program Execution
Input (English): 4, 19, ['6735', 'L', '3903', '9301', 'x', '8227', 'H', 'j', '2853', '7379', '5813', '991', 'D', '7387', 'B', 'F', '3571', 'a', '4541', 'x', '3949', 'N', 'G']
Output (English): 9301x8227Hj285373795813991D7387BF3571a4541