????????
      +---------
HGEPY | LLRENYLN
       -HGEPY
        =====
        TRPNPY
       -TLGUTG
        ======
         HEFJPL
        -URGJRN
         ======
          NNFFHN
         -TFHUFT
          ======
          ??????

base: 12
letters: EFGHJLNPRTUY
difficulty: medium