Task: Program Execution
Input (English): v, i, 2103, 1447, x, k, 1063, v, 6847, 3407, V, s, u, 4061, A, p, 6557, 2755, k, U, 8085, 7439
Output (English): 1, 2, 5, 6, 8, 11, 12, 13, 15, 16, 19, 20