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1,the string r and the string t in the same sub-string is replaced with the string s,the resulting string r as follows:
2,string s empty,the string length is% d empty no?
3,string s string r from the first 6 characters played four characters,a length of% d string s as follows:
4,copy the string t = string r,string t:
5,in the string t in the first 6 characters inserted before the string s,string t as follows:
6,from the string of characters from the first one to delete five characters,the string t as follows:
7,% d is t the first a character string starting,and the string s the same as the first location of a string
8,% d is t the first a character string starting,and the string s the same as the first location of a string
