View Code of Problem 50

import java.util.Scanner;

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