1*57718be8SEnji Cooper# word boundaries (ick) 2*57718be8SEnji Cooper[[:<:]]a & a a 3*57718be8SEnji Cooper[[:<:]]a & ba 4*57718be8SEnji Cooper[[:<:]]a & -a a 5*57718be8SEnji Coopera[[:>:]] & a a 6*57718be8SEnji Coopera[[:>:]] & ab 7*57718be8SEnji Coopera[[:>:]] & a- a 8*57718be8SEnji Cooper[[:<:]]a.c[[:>:]] & axcd-dayc-dazce-abc abc 9*57718be8SEnji Cooper[[:<:]]a.c[[:>:]] & axcd-dayc-dazce-abc-q abc 10*57718be8SEnji Cooper[[:<:]]a.c[[:>:]] & axc-dayc-dazce-abc axc 11*57718be8SEnji Cooper[[:<:]]b.c[[:>:]] & a_bxc-byc_d-bzc-q bzc 12*57718be8SEnji Cooper[[:<:]].x..[[:>:]] & y_xa_-_xb_y-_xc_-axdc _xc_ 13*57718be8SEnji Cooper[[:<:]]a_b[[:>:]] & x_a_b 14