// $Id: java.html,v 1.1 2002-06-06 12:10:06+09 kaiya Exp $

class Gcd{
private int r;

	Gcd(int a, int b){
		r=0;
		if(b==0){
			r=a;
		}else{
			Gcd g=new Gcd(b, a % b);
			r=g.result();
		}
	}

	int result(){ return r; }

	public static void main(String[] args){
	int a=0; int b=0;

		try{
			a=Integer.parseInt(args[0]);
			b=Integer.parseInt(args[1]);
		}catch(Exception e){
			e.printStackTrace();
			System.err.println("arguments expected.");
			System.exit(1);
		}

		if(a<=0 || b<=0){
			System.err.println("Only support a>0 and b>0.");
			System.exit(2);
		}

		Gcd g=new Gcd(a, b);
		System.out.println(a+","+b+"="+ g.result());
	}
}