????????
      +---------
LENRQ | QMMNMUYE
       -LENRQ
        =====
        NNPFLU
       -YUTXPR
        ======
         NRPMGY
        -YUTXPR
         ======
          REUEFE
         -RERREE
          ======
          ??????

base: 14
letters: EFGJLMNPQRTUXY
difficulty: medium
missing: J