???????
     ---------
WQUU ) NPLMJNQ
      -FXYM
       ====
       QUNTJ
      -QGRNH
       =====
         LJHN
        -HGGR
         ====
          PQPQ
         -HGGR
          ====
          ????

base: 15
symbols: FGHJLMNPQRTUWXY
difficulty: hard