class RoundTest{
public static void main(String []args){
String s="abcdefg";
round(s);

}
public static void round(String s){
StringBuffer sb=new StringBuffer("");
char []c=s.toCharArray();
int m=c.length-1;
for(int i=m;i>=0;i--){
  sb.append(String.valueOf(c[i]));
  
  }  
  System.out.println(sb.toString());
  
  }

}