a b {
  color: red;
}
a b :first-child, a b :nth-of-type(-2n+1) {
  blah: bloo;
}
a b :first-child .foo#bar:nth-child(even), a b :nth-of-type(-2n+1) .foo#bar:nth-child(even) {
  hoo: goo;
}
a b :first-child ::after, a b :nth-of-type(-2n+1) ::after {
  content: "glux";
  color: green;
}
a b :first-child :not(.foo), a b :nth-of-type(-2n+1) :not(.foo) {
  hoo: boo;
}
a b :first-child a, a b :nth-of-type(-2n+1) a {
  b: c;
}