Task: Program Execution
Input (English): f, b, 3911, 1697, K, 7917, R, 797, Y, 3131, 9383, i, 2889, F, 1323, 7775, H, M, k, g, c, V, H
Output (English): 1, 2, 5, 7, 9, 12, 14, 17, 18, 19, 20, 21, 22, 23