?????????
      +----------
TUYUP | LHJYFEGJM
       - TUYUP
        ======
         FHNGHG
        -MYYQMU
         ======
          UPUNPJ
         -UQYMHH
          ======
            NFGYM
           -TUYUP
            =====
            ?????

base: 13
letters: EFGHJLMNPQTUY
difficulty: medium