????????
      +---------
WEQYE | UEGUHHWH
       -WEQYE
        =====
        HQGPGH
       -HQHPXU
        ======
          PXPPW
         -UPQWY
          =====
          WWGUYH
         -WHNYYP
          ======
          ??????

base: 10
letters: EGHNPQUWXY
difficulty: easy