B	\(a\)\1\{1,2\}		abc		NOMATCH
B	\(a\)\1\{1,2\}		aabc		(0,2)(0,1)
B	\(a\)\1\{1,2\}		aaabc		(0,3)(0,1)
B	\(a\)\1\{1,2\}		aaaabc		(0,3)(0,1)