words:=("1001110011 1110111011 0010010010 1010101010 "
         "1111111111 0100101101 0100100 101 11 00 1").split(" ");
foreach w in (words){
   if(not n:=repString2(w)) "No repeat in ".println(w);
   else [0..*,n].tweak('wrap(z){ if(s:=w[z,n]) s else Void.Stop })
        .walk().concat(" ").println();
}