????????
      ----------
WPPNR ) RWXTPNEE
       -WPPNR
        =====
        NEQERN
       -NJJTUY
        ======
         QTCUNE
        -QYWXRW
         ======
          TTPQNE
         -TTQJCP
          ======
          ??????

base: 12
symbols: CEJNPQRTUWXY
difficulty: hard