1# word boundaries (ick)
2[[:<:]]a	&	a	a
3[[:<:]]a	&	ba
4[[:<:]]a	&	-a	a
5a[[:>:]]	&	a	a
6a[[:>:]]	&	ab
7a[[:>:]]	&	a-	a
8[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc	abc
9[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc-q	abc
10[[:<:]]a.c[[:>:]]	&	axc-dayc-dazce-abc	axc
11[[:<:]]b.c[[:>:]]	&	a_bxc-byc_d-bzc-q	bzc
12[[:<:]].x..[[:>:]]	&	y_xa_-_xb_y-_xc_-axdc	_xc_
13[[:<:]]a_b[[:>:]]	&	x_a_b
14