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

def retrieve_input():
    name_score = raw_input().split()
    yakko, wakko = int(name_score[0]), int(name_score[1])
    if yakko >= wakko:
        number_to_beat = yakko
    else:
        number_to_beat = wakko
    return number_to_beat

def calculate_number(number_to_beat):
    number_of_wins = 6 - number_to_beat + 1    
    return number_of_wins

def prob(number_of_wins):
    if number_of_wins == 1:
        return '1/6'
    if number_of_wins == 2:
        return '1/3'
    if number_of_wins == 3:
        return '1/2'
    if number_of_wins == 4:
        return '2/3'
    if number_of_wins == 5:
        return '5/6'
    if number_of_wins == 6:
        return '1/1'

def main():
    number_to_beat = retrieve_input()
    number_of_wins = calculate_number(number_to_beat)
    print prob(number_of_wins)

if __name__ == '__main__':
    main()