B	\(ab*\)\{1,9\}\1			abbbabbabbbbb	(0,10)(4,7)
B	\(ab\(xyz\)*\)\(c\(d\)*\)\{0,3\}	abcdcdc		(0,7)(0,2)(?,?)(6,7)(?,?)
B	\(^a\)\1				aabc		(0,2)(0,1)