Task: Program Execution
Input (English): 7445, y, q, o, 2115, 7577, 873, Y, A, V, 2235, 1837, p, p, s, 9731, E, u, V, 7679, S
Output (English): 2, 3, 4, 8, 9, 10, 13, 14, 15, 17, 18, 19, 21