????????
      ----------
WTPXG ) QGFRWQQQ
       -WTPXG
        =====
        YWGTLQ
       -YTGLLU
        ======
         RMQUQQ
        -RXGRNG
         ======
           LXYJQ
          -WTPXG
           =====
           ?????

base: 15
symbols: FGHJLMNPQRTUWXY
difficulty: medium
missing: H