CQGY
      +---------
NNCYE | CHYENMQC
       -CCQME
        =====
         FTCNM
        -QFPFE
         =====
          HMFMQ
         -GHMTE
          =====
          NEHQQC
         -NENGNE
          ======
            FMTC

base: 11
letters: CEFGHMNPQTY
difficulty: intermediate
restrictions: no multiplication