????????
      +---------
LUPTU | RHNEQUPL
       -LUPTU
        =====
        TLRRXU
       -TYXYEJ
        ======
         MJRRTP
        -MQTJYN
         ======
          LMXYXL
         -LMMTQX
          ======
          ??????

base: 14
letters: EGHJLMNPQRTUXY
difficulty: hard
missing: G