Task: Program Execution
Input (English): c 7681 2823 3285 141 t 8737 1175 1755 T 8863 6945 5713 R f U p 8977 7191 9213 6943 C o y H 1937 1421 y C
Output (English): 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 18, 19, 20, 21, 26, 27