They are numeric Keteks.
In WOK(Kaladin's book), the symbols are: Jezrien(1), Nale(2), Chanarach(3), Nale(2), Jezrien(1).
In WOR(Shallan's book), the symbols are: Shalash(6), Battar(7), Kalak(8), Battar(7), Shalash(6).
In OB(Dalinar's book), the symbols are: Ishar(10), Jezrien(1), Nale(2), Jezrien(1), Ishar(10).
So ln ROW(Venli/Eshonai's book), it should be Kalak(8), Talenel(9), Ishar(10), Talenel(9), Kalak(8).