void BigtoSmall()
{
char a;
cin >> a;
char b = a | 0x20;
cout << (char)b << endl;
}
void SmalltoBig()
{
char a;
cin >> a;
char b = a & ~ 0x20;
cout << (char)b << endl;
}
int main()
{
BigtoSmall();
cout << "hahhahah\n";
SmalltoBig();
getchar();
return 0;
}