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public class Student implements Cloneable {
	final int snum;
	static int last_snum=0;
	String name;
	public Student(String name){
		last_snum++;
		snum = last_snum;
		this.name = name; 
	}
	public String toString(){
		return Integer.toString(snum)+","+name;
	}
	public Object clone(){
		Student cs = new Student(name);		
		return cs;
	}
}