XXP
       +---------
ANAXHJ | AJPNMHPX
        -ANAXHJ
         ======
          QMJNMP
         -ANAXHJ
          ======
          XMXJNHX
         -XPXPPJQ
          =======
           PNMAHH

base: 8
letters: AHJMNPQX
difficulty: intermediate