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