Task: Program Execution
Input (English): r, 6773, N, 3993, I, 2591, T, W, 1797, 3663, 2313, 8091, 337, I, 749, 6379, 3297, 9351, 3009, Z, 253, 1549, B
Output (English): 2, 4, 6, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 21, 22