QENA
      ----------
 ANAA ) QEYTCFEC
       -FAUAE
        =====
         ENTQF
        -UAFAQ
         =====
          NNQAE
         -EATAF
          =====
           AFCYC
          -NACAT
           =====
            FAYA

base: 10
symbols: ACEFNQTUWY
difficulty: intermediate
missing: W