????????
      +---------
HMPMQ | MXXMHXXX
       -HMPMQ
        =====
        HFJTJX
       -HHRFGR
        ======
         XHRWRX
        - TTGWF
         ======
          HRHQGX
         -HHRFGR
          ======
          ??????

base: 11
letters: FGHJMPQRTWX
difficulty: intermediate