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

__author__ ='Obriel Muga'

if __name__ == '__main__':
    dados = input()
    a,b = map(int,dados.strip().split())
    mayor = max(a,b)
    prob = 7 - mayor
    result_a = prob
    result_b = 6
    if (prob == 6):
        print("1/1")
    elif (prob == 2):
        print("1/3")
    elif (prob == 3):
        print("1/2")
    elif (prob == 4):
        print("2/3")
    elif (prob == 5):
        print("5/6")
    elif (prob == 1):
        print("1/6")


    
