Task: Program Execution
Input (English): 2, 8, ['7601', '6709', 'b', 'O', '9977', 'u', '1969', 'G', '1421', '8101', 'p', '6201', 'X', '2303', 'H', '9731', '8747', 'f', '3403']
Output (English): 6709, 8101, f