Task: Program Execution
Input (English): Z, e, 6863, K, u, 1307, u, t, 615, 9993, 5237, r, p, p, 1943, y, j, 7035, 2541, s, 7503, 3469, 347, 7103
Output (English): 1, 2, 4, 5, 7, 8, 12, 13, 14, 16, 17, 20