????????
      +---------
GHEMM | NJHNMHJJ
       -GHEMM
        =====
         RTQTH
        -EPUGJ
         =====
         GTUUEJ
        -GTEQNP
         ======
           HJTGJ
          -EPUGJ
           =====
           ?????

base: 11
letters: EGHJMNPQRTU
difficulty: intermediate