例一

#text1i love storyi love booki like flower#text2i love storyi love milki don't love booki love beibeii like flower#resultd2 1a2 3i love milki don't love booki love beibeia3 2

例二

text1i love story   i love book      #deletei like floweri like sugertext2i love storyi love milk           #delete     #add                         #deletei don't love book      #deletei love beibeii like sugerd2 3   #删除三行a4 1   #在第四行插入一行i love milka5 3    #在第五行插入三行i don't love booki love beibeii like suger

#text1i love storyi love booki like floweri love beibeii like sugeri love leaves#text2 i love storyi love milki don't love booki love beibeii like suger#######################result##########d2 2    #删除两行a3 3    #增加三行i love milki don't love bookd6 1    #删除两行