????????
      +---------
EPFXJ | GCFEQUXE
       -PEGCF
        =====
        UUHGXU
       -URPEUC
        ======
          CQCGX
         -EPFXJ
          =====
          RFPHGE
         -RGJMCQ
          ======
          ??????

base: 12
letters: CEFGHJMPQRUX
difficulty: medium