????????
      +---------
NPNXQ | RQUTXERU
       -NPNXQ
        =====
        GXPGYE
       -GGQGYP
        ======
         PNWWGR
        -PMEMJN
         ======
          ENTJGU
         -EJJFTU
          ======
          ??????

base: 14
letters: EFGJMNPQRTUWXY
difficulty: hard
hints: G << M, Q << F, T << J