RE :  a*(b|cd)*(a|b)# Cara 1 : Followpos 1        :               1 , 2, 3, 5, 6 Followpos 2        :               2, 3, 5, 6 Followpos 3        :               4 Followpos 4        :               2, 3, 5, 6 Followpos 5        :               7 Followpos 6        :               … Continue reading →