Task: Program Execution
Input (English): 15, 20, ['3757', 'z', 'G', 'f', 'p', 'U', 'c', '689', '6995', '1057', 'h', 'q', '7801', 'k', 'C', 'A', 'w', 'X', 'b', 'r', '6451']
Output (English): r, b, X, w, A, C