XHR
      +--------
RNJHN | WYNHURJ
       -GPTMP
        =====
        RGFGXR
       -RGYLMP
        ======
          XGMHJ
         -RNJHN
          =====
           MRLH

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