a=input()
b,c=map(int,a.split('/'))
e=input()
f,g=map(int,e.split('/'))
if c==0 or g==0 :
print("Flase")
else:
s=(b*g)+(c*f)
m=c*g
for i in range(1,10):
if s%i==0 and m%i==0:
x=s/i
y=m/i
print(f"{x}/{y}")
else:
print(f"{s}/{m}")
YT1pbnB1dCgpCmIsYz1tYXAoaW50LGEuc3BsaXQoJy8nKSkKZT1pbnB1dCgpCmYsZz1tYXAoaW50LGUuc3BsaXQoJy8nKSkKaWYgYz09MCBvciBnPT0wIDoKCXByaW50KCJGbGFzZSIpCmVsc2U6CglzPShiKmcpKyhjKmYpCgltPWMqZwoJZm9yIGkgaW4gcmFuZ2UoMSwxMCk6CgkJaWYgcyVpPT0wIGFuZCBtJWk9PTA6CgkJCXg9cy9pCgkJCXk9bS9pCgkJCXByaW50KGYie3h9L3t5fSIpCgkJZWxzZToKCQkJcHJpbnQoZiJ7c30ve219Iik=