????????
      +---------
ECENP | TFTHFQJF
       -ECENP
        =====
         QWQPQ
        -FFJEH
         =====
          YTQNJ
         -HPHWF
          =====
           YNYCF
          -HPHWF
           =====
           ?????

base: 11
letters: CEFHJNPQTWY
difficulty: medium