????????
      +---------
HCQLW | CPQWPWPG
       -NGQNC
        =====
         WTHNW
        -NGQNC
         =====
         HCGTHP
        -HMHWTH
         ======
          HTHPQG
         -PWWWMC
          ======
          ??????

base: 10
letters: CGHLMNPQTW
difficulty: intermediate