Task: Program Execution
Input (English): 6749, 4613, 3949, 1949, 2341, V, 2785, 7285, 1917, L, 1271, C, 8283, 7577, f, 5843, t, M, 1205, 9437, y, 7881, 1543
Output (English): 1, 2, 3, 4, 5, 7, 8, 9, 11, 13, 14, 16, 19, 20, 22, 23