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ÒªÇ󣺽«×Ö·û´®"I am a good student."ת»»³É"student. good a am I"
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public class Application
{
 private String s;
 public void setS(String s)
 {
  s=s;
 }
 public String getS()
 {
  return s;
 }
 private static String sr(String s)
 {
  int l=s.length();
  String space=" ";
  String strnew="";
  
  int i=0;
  while(s.contains(space))
  {
   int spaceIndexS=s.lastIndexOf(space);
   if(i==0)
   {
   strnew=strnew+s.substring(spaceIndexS+1);
   }
   else
   {
   strnew=strnew+s.substring(spaceIndexS); 
   }
   s=s.substring(0,spaceIndexS);
   i++; 
  }
  strnew+=space+s;
  return strnew;
 }
 public static void main(String[] args)
 {
  
  Application a=new Application("I am a good student.");
   
  System.out.println(a.sr(a.getS));
  
 }
}


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