Task: Program Execution
Input (English): e, 9517, 9649, k, 9843, 4509, m, 7233, 8129, 6267, 1275, K, 503, O, C, c, c, 497, 6553, H, i
Output (English): 2, 3, 5, 6, 8, 9, 10, 11, 13, 18, 19