FHPP
      +---------
HYGGJ | NYWYTYHP
       -TFGPJ
        =====
        WHWNTY
       - GPGNJ
        ======
         HFNGYH
        -FGTGFJ
         ======
          HWJUHP
         -FGTGFJ
          ======
           WHLWP

base: 11
letters: FGHJLNPTUWY
difficulty: medium