(do
	(let (a 100  b 200  c 300) (say b))
	(do
		(let (a 100  b 200  c 300) (say b))
		(def x 99)
		(say "hii")
		(say x)
		(let (a 100  b 200  c 300) (say b))
		(let (x 77) (say x))
		(say x))
	(let (a 100  b 200  c 300) (say b)))