a=3,b=4a=3, b=4a=3,b=4
a=3,b=7a=3, b=7a=3,b=7
a=2,b=4a=2, b=4a=2,b=4
a=6,b=3a=6, b=3a=6,b=3
a=5,b=2a=5, b=2a=5,b=2
