RTNT
      +---------
YRRPW | NLLYLTLR
       -YRRPW
        =====
        REGFLT
       -RGTCCW
        ======
          LFTTL
         -ENPRW
          =====
          REPLLR
         -RGTCCW
          ======
            ELTR

base: 11
letters: CEFGLNPRTWY
difficulty: intermediate
restrictions: no multiplication