LRLN
      -----------
LFRLE ) TUFFUTERT
       -FERUUR
        ======
         RRNHNE
        -UTHTTL
         ======
          TRRLUR
         -FERUUR
          ======
           NHTHHT
          -RNTHFT
           ======
            FEEFH

base: 8
symbols: EFHLNRTU
difficulty: intermediate
restrictions: no multiplication