Task: Program Execution
Input (English): 453, 7519, 7513, z, l, 3717, O, 1195, 4543, f, 2405, V, X, 4833, 1737, 673, v, I, 7987, t
Output (English): 4, 5, 7, 10, 12, 13, 17, 18, 20