#include <stdio.h>
int main ()
{
void action1(int,int),action2(int,int);
char ch;
int a=15,b=23;
ch=gechar();
switch(ch)
{
case 'a':
case 'A': action1(a,b);break;
case 'b':
case 'B': action2(a,b);break;
default: putchar('\a');

}
return 0;
}