public class HelloWorld {//以為簡單，原來都是套路
public static void main(String[] args) {
StringBuilder str=new StringBuilder();
str.append("jaewkjldfxmopzdm");
int l=str.length();
int x=l%3;
for(int i=l/3;i>=0;i--){
str.insert(i*3+x,",");
}
System.out.print(str.toString());
}
}
