Task: Program Execution
Input (English): x, 757, 2003, 1027, v, 925, 3531, 6891, D, 5727, 7755, g, e, 3049, W, 2403, R, a, l, 5193, 9949
Output (English): 1, 5, 9, 12, 13, 15, 17, 18, 19