????????
      +---------
GEELU | XLUTUQTP
       -GEELU
        =====
        GJREJQ
       -GJXXUX
        ======
          ETYPT
         -QLRXH
          =====
          GUTNNP
         -GUJJLY
          ======
          ??????

base: 14
letters: EGHJLNPQRTUWXY
difficulty: medium
missing: W