Riemann zeta function is the most important equation in Number Theory, because it contains the secret of prime number. The Riemann zeta function can be expressed as:

$$\zeta(s)=\frac{1}{\Gamma(s)} \int_0^\infty \frac{x^{s-1}}{e^x-1}dx$$
$$\zeta(s)=\frac{1}{2 \pi i} \Gamma(1-s) \oint_{\gamma} \frac{z^{s-1} e^{z}}{1-e^{z}} \mathrm{d} z$$
$$\zeta(1-s)=2(2 \pi)^{-s} \Gamma(s) \cos \left(\frac{\pi s}{2}\right) \zeta(s)$$
$$\xi(s)=\pi^{-\frac{s}{2}} \Gamma\left(\frac{s}{2}\right) \zeta(s)$$

Let's call a positive integer composite if it has at least one divisor other than $1$ and itself. For example:
the following numbers are composite: $1024,\ 4,\ 6,\ 9$;
the following numbers are not composite: $13,\ 1,\ 2,\ 3,\ 37$
You are given a positive integer $d$. Find two composite integers $a,\ b$ such that $b-a=d$.

It can be proven that solution always exists.
If there are several possible solutions, you can print any.