????????
      +---------
HYXTT | QGYGENHU
       -WNYHH
        =====
        HYRXQN
       -HXEMNN
        ======
         HXGURH
        -HTXQLL
         ======
          HHRTWU
         -HTXQLL
          ======
          ??????

base: 13
letters: EGHLMNQRTUWXY
difficulty: medium