x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1

x+y=0

x-y=0

x-y=1

x+y=1