????????
      +---------
TUEMT | FNUXJNJE
       -TUEMT
        =====
        UTPJPN
       -UUJLRU
        ======
          HMMFJ
         -JYTXJ
          =====
          UTXJLE
         -UUJLRU
          ======
          ??????

base: 13
letters: EFHJLMNPRTUXY
difficulty: intermediate