?????????
      +----------
HRTFH | LRFGNQXYJ
       -LWWXUJ
        ======
         TLNNTX
        -MFYMJH
         ======
          TRHFLY
         -TGXRGM
          ======
            GFTJJ
           -QGNYY
            =====
           ??????

base: 14
letters: FGHJLMNQRTUWXY
difficulty: intermediate