Task: Program Execution
Input (English): u, 1793, a, 737, o, 5025, 7649, 7469, 2389, c, n, 7889, 9499, v, G, 8537, X, 909, V, q, 1895, P, 5683, i
Output (English): 2, 4, 6, 7, 8, 9, 12, 13, 16, 18, 21, 23