Task: Program Execution
Input (English): 12, 18, ['O', 'l', '6187', '8145', 'B', '2127', '5985', 'l', '9543', 'U', 'J', '4521', 'X', '3665', '5769', '5723', '9047', 'i', 'j']
Output (English): i9047572357693665X4521