????????
      +---------
LNLNH | QNJMULEU
       -QUQRQ
        =====
         EQEJL
        -LNLNH
         =====
          PGTJE
         -QUQRQ
          =====
          LYQHMU
         -LQUYGT
          ======
          ??????

base: 13
letters: EGHJLMNPQRTUY
difficulty: hard