Task: Program Execution
Input (English): 2035, v, O, 3169, 8965, 6879, 1063, z, 9315, 7705, 2411, O, 4399, 7131, 975, h, i, y, 2171, 667, w, Z, r
Output (English): 1, 4, 5, 6, 7, 9, 10, 11, 13, 14, 15, 19, 20