YTPX
      +---------
HNLTF | LNYQMGFW
       -UTWMT
        =====
        YMFHQG
       -YPYYXM
        ======
         JTJYUF
        -JMLMMJ
         ======
          YUMFQW
         -YHTPFX
          ======
           YQNFL

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard
missing: R