?????????
      +----------
AGGUG | MMGMNPQQM
       -MUAMX
        =====
         NQXNP
        -UQNMN
         =====
          MUNGQ
         -MUAMX
          =====
            PMQQM
           -AGGUG
            =====
            ?????

base: 8
letters: AGMNPQUX
difficulty: intermediate