6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3


var l = readline().split(' ');
var Y = parseInt( l[0] );
var W = parseInt( l[1] );

Y = Math.max(Y, W);
switch(Y){
	case 1:
	print('1/1');
break;
	case 2:
	print('5/6');
break;
	case 3:
	print('2/3');
break;
	case 4:

	print('1/2');
break;
	case 5:

	print('1/3');
break;
	case 6:

	print('1/6');
break;
}