Task: Program Execution
Input (English): 6441, 9685, 5939, N, 6271, 1881, u, 5079, 7449, 8715, t, x, 7997, A, 8691, 2785, 2729, J, 6607, 4401, E, 8145, x, 107
Output (English): 4, 7, 11, 12, 14, 18, 21, 23