Task: Program Execution
Input (English): w, 9725, 6883, p, c, s, F, S, 1599, t, 1697, e, 7865, 7999, Z, Y, 8581, 6371, b, 9473, V
Output (English): 2, 3, 9, 11, 13, 14, 17, 18, 20