Task: Program Execution
Input (English): 5945, Y, U, 2569, 1241, I, 2679, 4663, q, 5451, U, 6411, Q, T, 7041, X, l, 143, O, 9527, 7481, 6373, 1375
Output (English): 2, 3, 6, 9, 11, 13, 14, 16, 17, 19