????????
      +---------
QQYHY | WQUMWRJW
       -QQYHY
        =====
        XGGJJR
       - UTNRH
        ======
         XXXQNJ
        - UTNRH
         ======
          LXYQLW
         -XYTFWL
          ======
          ??????

base: 14
letters: FGHJLMNQRTUWXY
difficulty: medium