QTM
      +---------
QUXUQ | JMJTHYUQ
       -JCYFGT
        ======
         TUWJFU
        -FTYJYT
         ======
          JTXYMQ
         -YYCTTG
          ======
           MGFCT

base: 12
letters: CFGHJMQTUWXY
difficulty: medium