???????
     +--------
HRWP | FFUPWUR
      -FRGW
       ====
        WUWW
       -UYFW
        ====
         UMGU
        -HRWP
         ====
         HGMMR
        - YYRG
         =====
          ????

base: 9
letters: FGHMPRUWY
difficulty: intermediate