Task: Program Execution
Input (English): 6, ['5607', 'X', 'y', '5911', '3745', 't', 'X', '4465', '3965', 'G', '1421', 'N', 'C', 'x', 't', 'L', 'R', 'w', '5925', '9519', 'H']
Output (English): 5607, X, C, 5925