Task: Program Execution
Input (English): O, 4385, Y, 7163, 9655, t, Y, 7795, k, 4109, 1541, 4481, 9683, O, 2093, v, 4989, s, 4993, u
Output (English): 1, 3, 6, 7, 9, 14, 16, 18, 20