?????????
      -----------
HXXRX ) FFXFAGLLF
       -FRHFE
        =====
         ALEAG
        -RLAFA
         =====
          FRAXL
         -FRHFE
          =====
            GFLLF
           -HXXRX
            =====
            ?????

base: 8
symbols: AEFGHLRX
difficulty: intermediate