UFG
      +---------
WECHC | GWHQQWUF
       -GHHFGF
        ======
         UFQMMU
        -UWRQMQ
         ======
          QMUHGF
         -QWGEEE
          ======
           JJMJW

base: 11
letters: CEFGHJMQRUW
difficulty: hard