Task: Program Execution
Input (English): 9995, 5449, Z, 7841, 9791, 777, h, f, w, t, N, 3667, M, L, 977, 3333, M, 5597, 7351, 2419, p, 1815
Output (English): 3, 7, 8, 9, 10, 11, 13, 14, 17, 21