a, b {
	color: white
}

a c, a d, b c, b d {
	color: blue
}

a, b {
	color: white
}

a c, a d, b c, b d {
	color: blue
}

a c e, a c f, a d e, a d f, b c e, b c f, b d e, b d f {
	color: black
}

a, b {
	color: red
}

a a, b b {
	color: white
}

a {
	color: red
}

@media {

	a {
		color: white
	}
	}

a {
	color: red
}

a b {
	color: white
}

@media {

	a b {
		color: blue
	}
}

@media {

	a {
		color: black
	}

	a c {
		color: yellow
	}
	}

a {
	color: red;

	@unknown test {
		color: white;
	}
}

b {
	color: white;

	@phone {
		color: blue;
	}
}

@media {

	b {
		color: black
	}

	b c {
		color: yellow
	}
	}