????????
      +---------
LYNML | WFFJFHJE
       -NHQYP
        =====
        QWLEJH
       -QPEJEU
        ======
         LUUJPJ
        -URQWEF
         ======
          LQUPNE
         -URQWEF
          ======
          ??????

base: 13
letters: EFHJLMNPQRUWY
difficulty: challenging