Task: Program Execution
Input (English): 1, 2, ['O', 'E', 'f', 'J', '1709', '9297', 'q', '5655', '1435', '5215', '4045', '9895', '5061', '3347', '9489', 'u', '6395', 'K', 'A', 'L', '289', 'v', 'b']
Output (English): EO