(1)a=1,b=72,a+b=73
(2)a=2,b=72,a+b=74
(3)a=3,b=72,a+b=75
(4)a=4,b=72,a+b=76
(5)a=6,b=72,a+b=78
(6)a=8,b=9,a+b=17
(7)a=8,b=72,a+b=80
(8)a=9,b=72,a+b=81
(9)a=12,b=72,a+b=84
(10)a=18,b=24,a+b=42
(11)a=18,b=72,a+b=90
(12)a=24,b=36,a+b=60
(13)a=24,b=72,a+b=96
(14)a=36,b=72,a+b=108