????????
      +---------
WPHWP | NRNTLUWG
       -WPHWP
        =====
        LNNNGU
       -LWWNLP
        ======
         WWTAHW
        -WAARTG
         ======
          APNPHG
         -ARRURL
          ======
          ??????

base: 10
letters: AGHLNPRTUW
difficulty: easy