????????
      ----------
HWTLY ) YWCTTYPT
       -YPHWY
        =====
         XYHUY
        -HWTLY
         =====
         HRNULP
        -HRHWUX
         ======
           WPPHT
          -RRUXN
           =====
           ?????

base: 12
symbols: CHLNPQRTUWXY
missing: Q
difficulty: medium