Foo 1: a = 0, b = 0, x = 0, y = 0
Foo 2: a = 2, b = 0, x = 0, y = 0
Foo 3: a = 2, b = 3, x = 0, y = 0
Foo 4: a = 2, b = 3, x = 0, y = 0
Foo 5: a = 2, b = 3, x = 0, y = 0
Bar 1: a = 2, b = 3, x = 0, y = 0
Bar 2: a = 2, b = 3, x = 5, y = 0
Bar 3: a = 2, b = 3, x = 5, y = 7