There exist two servers S$1$ and S$2.$ Both servers support the following services:

Services supported by server S$1$:

int SetPrice$($string$,$ float$)$

float GetPrice$($string$)$

void BuyStock$($string$,$ int$)$

void SellStock$($string$,$ int$)$

Services supported by server S$2$:

int SetPrice$($string$,$ int$)$

float GetPrice$($string$)$

void BuyStock$($int$,$ string$)$

void SellStock$($string$,$ int$)$

int SetPrice$($string$,$ float$)$