HNFNM
       +-----------
HGWXFL | XGXFXXHFLM
        -HGWXFL
         ======
          GMMHLH
         -GLLFXN
          ======
           HHHXLFL
          - GLLFXN
           =======
            HWLNMHM
           -HWNWNWM
            =======
              HHHMF

base: 8
letters: FGHLMNWX
difficulty: easy
restrictions: no multiplication