????????
      +---------
XTXEL | JYJLFFQL
       -RQJLR
        =====
        MQYYYF
       -MWYUJW
        ======
         XGRXUQ
        -TYMFET
         ======
          MQNFTL
         -MWYUJW
          ======
          ??????

base: 14
letters: EFGJLMNQRTUWXY
difficulty: intermediate