FMQH
    +-------
MMG | HLXGPQ
     -QQY
      ===
      FRQG
     -NLHM
      ====
       TJFP
      -TWXQ
       ====
        UGLQ
       -UUMX
        ====
         TPN

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard