Task: Program Execution
Input (English): 2319, i, 3579, 8443, 5395, y, y, 2333, 5181, 4615, 1841, Z, 5475, v, G, 9717, 8097, R, 3669, x, e, b, o
Output (English): 1, 3, 4, 5, 8, 9, 10, 11, 13, 16, 17, 19