Task: Program Execution
Input (English): 4, ['1803', 'J', 'D', '6163', '7011', '927', '2607', 'O', '4125', 'B', 'R', 'S', '9835', 'T', '6015', 'r', 'X', 'K', '8543']
Output (English): 1803, J, D, 6163