#stacks_in_2 {
	margin: 0px 0px 15px 0px;
}

#stacks_in_6 {
	margin: 0px 0px 15px 0px;
}

#stacks_in_4 {
	margin: 0px 0px 15px 0px;
}

#stacks_in_31 {
	margin: 0px 0px 15px 0px;
}

#stacks_in_18 {
	margin: 15px 0px 0px 0px;
}