????????
      +---------
PXQGY | TGFTGRTU
       -JLFRG
        =====
         RWXWR
        -PXQGY
         =====
         HQNLPT
        -HGHJJP
         ======
          XRTQMU
         -XMTWRL
          ======
          ??????

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: medium