def fib(n):
    return (0 if n == 0
            else 1 if n == 1
            else fib(n - 1) + fib(n - 2))
def fib(n):
    return (0
            if n == 0
            else 1
            if n == 1
            else fib(n - 1) + fib(n - 2))

print(fib(6))

# expected: 8
