????????
      +---------
HWRWM | YTEHUPGL
       -LEHWL
        =====
         RTLWP
        -YGGLH
         =====
          TLEHG
         -MTTWQ
          =====
          HNHYML
         -HPHQLN
          ======
          ??????

base: 13
letters: EGHLMNPQRTUWY
difficulty: hard