YNY
      +--------
NNQNT | WGQYGWG
       -NNQNT
        =====
        JJGQNW
       -JJJWYN
        ======
          NGTJG
         -NNQNT
          =====
           JQWN

base: 8
letters: GJNPQTWY
missing: P
difficulty: intermediate
restrictions: no multiplication