????????
     +---------
XYPU | HMMUTHXM
      -XYPU
       ====
        UMPT
       -UHMM
        ====
          YHHX
         -MXXT
          ====
          XXPMM
         -XPUYH
          =====
          ?????

base: 7
letters: HMPTUXY
difficulty: intermediate