NWH
       +---------
HNNNWH | YHYHHHNQ
        -HNNNWH
         ======
         MMWNYQN
        -MQWYNQQ
         =======
          NYMWQNQ
         -NHHHYNH
          =======
           NYQQYH

base: 6
letters: HMNQWY
difficulty: intermediate