MLN
      +--------
MWQGP | TQRGRML
       -UQMQM
        =====
        MEQWQM
       -PFEQTL
        ======
         PTREUL
        -PYMGMN
         ======
          PTWMW

base: 13
letters: EFGLMNPQRTUWY
difficulty: hard