#adds two fractions

def readFraction():
    s = input( "Enter a fraction n/d or integer: ")
    fields = s.split( "/" )
    num = eval(fields[0])
    if fields == 1:
        denom = 1
    else:
        denom = eval(fields[1])
    return (num, denom)

def addFractions(f1, f2):
    num = f1[0]*f2[1] + f1[1]*f2[0]
    denom =f1[1]*f2[1]
    return (num, denom)

def reduce(f):
    num = f[0]
    denom = f[1]
    for d in range(num, 1, -1):
        if num%d==0 and denom%d==0:
            num = num//d
            denom = denom//d
    return (num, denom)

def printFraction(f):
    num = f[0]
    denom = f[1]
    if denom == 1:
        print(num)
    else:
        print( "%d/%d" %(num, denom ))
        
def main():
    f = readFraction()
    g = readFraction()
    h = addFractions(f, g)
    answer = reduce(h)
    printFraction(answer)

main()