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How can I show the number of positions lines have moved in diff output?

top1 1,facebook.com 2,google.com 3,youtube.com 4,yahoo.com 5,wikipedia.org 6,baidu.com 7,live.com 8,amazon.com 9,qq.com 10,twitter.com top2 1,facebook.com 2,google.com 3,youtube.com 4,yahoo.com ...