.div {
  one: null;
  one: world;
  one: NULL world;
  one: a, b;
  two: a, b;
}
p:before {
  content: "I ate  pies!";
}
.foo {
  -webkit-border-radius: 10;
  border-radius: 10;
}
.fu {
  -webkit-border-radius: 20;
  border-radius: 20;
}
.bar {
  -webkit-border-top-left-radius: 30;
  border-top-left-radius: 30;
}