Task: Program Execution
Input (English): 1, 13, ['X', '4129', 'W', 'J', '2095', '4693', 'V', '4921', '243', 'E', 't', '2827', 'x', '7987', 'Q', 'x', '8501', '7763', '6647', 'V', '2929', 'u', '2179', '2303', '5471']
Output (English): x2827tE2434921V46932095JW4129X