TQT
       +---------
NEFHQN | GETGNHFQ
        -NEFHQN
         ======
         TFHHGFF
        -TGNQNNG
         =======
           GGHNTQ
          -NEFHQN
           ======
           HQNEQT

base: 7
letters: EFGHNQT
difficulty: intermediate