You can use the pseudo contentproperty :after, if you do not want to use this, than you need to feed for each tagu
.numbers u:after {
content: "\00a0\00a0\00a0\00a0";
}
Demo
Info: What is 00a0 here? This is Non Break Space
You can also use something like
.numbers u:after {
content: "................";
color: transparent;
}
Demo 2 (but I would prefer\00a0one ..)
, IE8 content, :after, Side Notes, ::after IE9, :after . .