????????
      +---------
UXLNC | CQYXQXGL
       -YUNWQ
        =====
        LRRUHX
       -LXLMHM
        ======
         LNMCYG
        -LLGXMG
         ======
          WCRUHL
         -WYUWLW
          ======
          ??????

base: 12
letters: CGHLMNQRUWXY
difficulty: medium