MLFG
      +---------
QYRER | FJFQHHPN
       -QYRER
        =====
        ELMNJH
       -EJYLWQ
        ======
         PQGJGP
        -PNUMLU
         ======
          JLMFGN
         -JEPNPW
          ======
           ERLNN

base: 14
letters: EFGHJLMNPQRUWY
difficulty: hard