Task: Program Execution
Input (English): 7621, 811, 1721, L, 9513, 4925, 2447, 2569, 6001, 87, 8241, 9587, 7671, 1487, 6033, 7749, 8651, s, C, 3407, 77, E
Output (English): 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21