a,*_,e,k=eval('int(input()),'*6);print((':('*(e-a>k)or'Yay!'))
a,*_,e,k=eval('int(input()),'*6);print(('Y:a(y !'[e-a>k::2]))
a, *_, e, k = eval("int(input())," * 6)
print((":(" * (e - a > k) or "Yay!"))

a, *_, e, k = eval("int(input())," * 6)
print(("Y:a(y !"[e - a > k :: 2]))

-print((":(" * (e - a > k) or "Yay!")) +print(("Y:a(y !"[e - a > k :: 2]))