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@mixin posa ($top: null, $right: null, $bottom: null, $left: null) {
	position: absolute;
	top: $top;
	right: $right;
	bottom: $bottom;
	left: $left;
}

@mixin posr ($top: null, $right: null, $bottom: null, $left: null) {
	position: relative;
	top: $top;
	right: $right;
	bottom: $bottom;
	left: $left;
}