????????
      +---------
HYFQP | QRTHMPNR
       -RMQNF
        =====
        LYMRNP
       -LURRMQ
        ======
         LQUYYN
        -LHPNTR
         ======
          HUJFPR
         -TFNPLL
          ======
          ??????

base: 12
letters: FHJLMNPQRTUY
difficulty: medium