# word boundaries (ick)
[[:<:]]a	&	a	a
[[:<:]]a	&	ba
[[:<:]]a	&	-a	a
a[[:>:]]	&	a	a
a[[:>:]]	&	ab
a[[:>:]]	&	a-	a
[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc	abc
[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc-q	abc
[[:<:]]a.c[[:>:]]	&	axc-dayc-dazce-abc	axc
[[:<:]]b.c[[:>:]]	&	a_bxc-byc_d-bzc-q	bzc
[[:<:]].x..[[:>:]]	&	y_xa_-_xb_y-_xc_-axdc	_xc_
[[:<:]]a_b[[:>:]]	&	x_a_b