????????
      +---------
XHHTA | XGXXYTYU
       -XHHTA
        =====
         GXAAT
        -XHHTA
         =====
         EXHMEY
        -EEHYMM
         ======
          YHEXXU
         -AMHAEE
          ======
          ??????

base: 9
letters: AEGHMTUXY
difficulty: intermediate