The	O	the	NONE
two	O	two	NONE
main	O	main	NONE
swimming	O	swimming	NONE
strokes	O	stroke	NONE
are	O	be	NONE
the	O	the	NONE
breaststroke	O	breaststroke	NONE
and	O	and	NONE
the	O	the	NONE
crawl	O	crawl	NONE
.	O	.	NONE