package text.java;

public class shiyan6_1  {
        String  number;
        shiyan6_1 next=null;
        public shiyan6_1(String  number) {
        this.number = number;
    }
    @Override
    public String toString() {
        if (this.next == null) {
            return this.number;
        }
        return this.number + "->" + this.next.toString();
    }
}