????????
     +---------
WMHP | PTTUTTUW
      -PWTM
       ====
         PGTT
        -PWTM
         ====
          TPPU
         -WMHP
          ====
          WMUWW
         -WTTUW
          =====
          ?????

base: 7
letters: GHMPTUW
difficulty: intermediate