????????
      +---------
XLERE | LQUHUXQE
       -LXLME
        =====
         HETGX
        -XLERE
         =====
          FCFMQ
         -MHEHC
          =====
           FLGQE
          -MHEHC
           =====
           ?????

base: 12
letters: CEFGHLMQRTUX
difficulty: hard