????????
      +---------
YQGUF | LYGHHGRU
       -YQGUF
        =====
        FLNXYG
       -FTHJNE
        ======
         TXRYRR
        -RJXXUU
         ======
          RFTHLU
         -XUGRUT
          ======
          ??????

base: 14
letters: EFGHJLNPQRTUXY
difficulty: medium
missing: P