????????
      +---------
MWLMH | FGPLEQEE
       -YTWYM
        =====
        HXYYLQ
       -HWPUWL
        ======
         HFYMHE
        -HYMFET
         ======
          HLLQHE
         -HWPUWL
          ======
          ??????

base: 13
letters: EFGHLMPQTUWXY
difficulty: hard