def Fib(n):
    i=n+2
    if (n==0):
        yield 1
    if (n==1):
        yield 1
    else:
        for i in range(n):
            yield i


for c in Fib(5):
    print(c)

##(``F(0)=1, F(1)=1, FN=F(N-1) + F(N-2)``).