If $$2^{x+l} + 3^{Y} = 59$$ and $$2^{x + 3} + 3^{y + 1} = 209$$, then the length of the hypotenuse of the right - angle triangle having $$x$$ and y as sides is

A

13

B

$$\sqrt{13}$$

C

5

D

$$\sqrt{5}$$