37.1 past continue sentences to present continue tense.java

/*
Ram was writing the essay and by mistakely he wrote in past continue tense inspite of present continue tense so write a program by using String class method to replace all.

Input Format

This was a beautiful Flower.

Constraints

All the sentences should be is the past continue sentences only.

Output Format

This is a beautiful Flower.

Sample Input 0

He was having ten pens and all pens were in good condition.
Sample Output 0

He is having ten pens and all pens are in good condition.
Sample Input 1

he is working in bank
Sample Output 1

Invalid
*/
import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner sc = new Scanner(System.in);
        //input
        String input = sc.nextLine();
        if(input.indexOf("was")!=-1 || input.indexOf("were")!=-1 || input.indexOf("Was")!=-1 || input.indexOf("Were")!=-1)
        {
            input = input.replaceAll("was","is").replaceAll("were","are");
            System.out.print(input);
        }
        else
            {System.out.print("Invalid");}
    }
}