Task: Program Execution
Input (English): 8993, 5339, o, 8167, D, 9415, y, p, n, 3953, f, 789, S, K, 5781, y, 5437, 9719, L, Z, j, 6959, d, 3297
Output (English): 3, 5, 7, 8, 9, 11, 13, 14, 16, 19, 20, 21, 23