????????
      +---------
MQXEJ | XMEJQYYR
       -NRNFT
        =====
        YGWNYY
       -FLJLMM
        ======
         FFNXWY
        - LWTNY
         ======
          FXHRGR
         -FNYFJQ
          ======
          ??????

base: 14
letters: EFGHJLMNQRTWXY
difficulty: intermediate