????????
      ----------
PGTEG ) HGHGXPTY
       -PGTEG
        =====
        RUWPPP
       - PGTEG
        ======
         TXFFHT
        -EYHEUP
         ======
          PPEPPY
         -PETGPR
          ======
          ??????

base: 11
symbols: EFGHPRTUWXY
difficulty: medium