View Code of Problem 54

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        for (int i = 0; i < str.length(); i++) {
            if(i!=str.length()-1)
                System.out.print(str.charAt(i)+" ");
            else
                System.out.println(str.charAt(i));
        }
    }
}