Brain Teaser

Try to get 56 in all the blue boxes, using the pull-down lists!

	=	=	=	=	=	=
	=	3 7 15 31	3 7 15 31	3 7 15 31	3 7 15 31	=
	=	3 7 15 31	3 7 15 31	3 7 15 31	3 7 15 31	=
	=	3 7 15 31	3 7 15 31	3 7 15 31	3 7 15 31	=
	=	3 7 15 31	3 7 15 31	3 7 15 31	3 7 15 31	=
	=	=	=	=	=	=