Task: Program Execution
Input (English): 6627, A, 5251, K, F, k, 9347, u, 25, E, f, 4947, 9473, H, C, w, J, 5099, z, 869, 3425, u
Output (English): 2, 4, 5, 6, 8, 10, 11, 14, 15, 16, 17, 19, 22