x=1	y=2	xy=0.5	sy=1.5	xt=0.25	st=0.75
x=1	y=	xy=	sy=	xt=0.25	st=0.75
x=	y=2	xy=	sy=1.5	xt=	st=0.75
x=	y=	xy=	sy=	xt=	st=0.75
a=1	y=2	xy=0	sy=1.5	xt=0	st=0.75
a=1	y=	sy=	xt=0	st=0.75
a=	y=2	xy=0	sy=1.5	xt=0	st=0.75
a=	y=	sy=	xt=0	st=0.75
x=1	b=2	xy=1	sy=3	xt=0.25	st=0.75
x=1	b=	xy=1	sy=3	xt=0.25	st=0.75
x=	b=2	sy=3	xt=	st=0.75
x=	b=	sy=3	xt=	st=0.75
