QQRP
      ----------
QPRGP ) XGRRQLUQ
       -PGXRQ
        =====
        NLNLLL
       - PGXRQ
        ======
         QPNLXU
        -QGNUNG
         ======
          NRUPNQ
         -NPPPQN
          ======
           NXRRN

base: 8
symbols: GLNPQRUX
difficulty: intermediate
restrictions: no multiplication