TeX_Quotes.java

import java.util.*;
public class main{
    public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
       boolean check = false;
       while(input.hasNext()) {
       		String str = input.nextLine();
       		for(int i=0;i<str.length();i++) {
       			if(str.charAt(i) == '\"') {
       				if(check) {
       					check = false;
       					System.out.print("\'\'");
       				}
       				else {
       					check = true;
       					System.out.print("``");
       				}
       			}
       			else {
       				System.out.print(str.charAt(i));
       			}
       		}
       		
       		System.out.println();
       }
    }
};