????????
      +---------
QJMUP | QYHQMTWQ
       -QJMUP
        =====
         RWMYT
        -WFRER
         =====
         QJXPGW
        -QWGGGW
         ======
           EYXXQ
          -PEWYQ
           =====
           ?????

base: 14
letters: EFGHJMPQRTUWXY
difficulty: medium