Task: Program Execution
Input (English): 1, 8, ['K', '3961', '7903', '6731', '9531', '7845', '9295', 'B', 'r', 'z', '4805', 'P', 'n', 'Q', '3583', 'Q', 'b', 'j', '2369', '253']
Output (English): K, r, b