Task: Program Execution
Input (English): 15, 21, ['4137', '7793', '591', 'r', 'd', 'g', 'q', 'A', 'i', '623', 'z', '6495', '2359', '3013', 'y', '3971', 'y', '1287', 'm', '1759', 'X', 'p', '5509', 'k']
Output (English): X, 1759, m, 1287, y, 3971, y