View Code of Problem 50

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str1 = sc.nextLine();
        boolean flag = true;
        for (int i = 0; i < str1.length(); i++) {
            if(str1.charAt(i)>='0'&&str1.charAt(i)<='9'){
                System.out.print(str1.charAt(i));
                flag = true;
            }
            else if(flag ){
                System.out.print("*");
                flag =false;
            }
        }
        System.out.println();
    }
}