Task: Program Execution
Input (English): 1727, H, I, 8989, 4817, 7737, H, j, L, q, Z, 465, 9937, 8111, 5123, 2973, 1671, y, 5925, 827
Output (English): 1, 4, 5, 6, 12, 13, 14, 15, 16, 17, 19, 20