NNP
      +---------
AGWHA | GAHFWWPF
       -GJHAAJ
        ======
         GWWGHP
        -GJHAAJ
         ======
          HPNPWF
         -HGAFFG
          ======
           NHANJ

base: 9
letters: AFGHJLNPW
missing: L
difficulty: intermediate
restrictions: no multiplication