????????
      +---------
MYXTX | YGNJNMGX
       -YMYCX
        =====
         JXHLM
        -MYXTX
         =====
          RQRCG
         -CJXJQ
          =====
           RYLGX
          -CJXJQ
           =====
           ?????

base: 12
letters: CGHJLMNQRTXY
difficulty: hard