gistfile1.java

import java.util.Random;

class Untitled {
	public static void main(String[] args) {
		Random random = new Random();
		
		for(int i = 0; i < 100; ++i) {
			if(random.nextInt() % 4 == 0)
				System.out.print("O");
			else 
				System.out.print("X");
		}

	}
}