View Code of Problem 50

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		String s=scanner.nextLine();
		StringBuilder ans=new StringBuilder();
		boolean flag=false;
		for(char c:s.toCharArray()) {
			if(c>='0'&&c<='9') {
				flag=false;
				ans.append(c);
			}
			else {
				if(!flag) {
					ans.append('*');
					flag=true;
				}
				
			}
		}
		System.out.println(ans);
		
	}

}