#include <iostream>
#include <cmath>
#include <string>
using namespace std;
int main()
{
	string thuong, hoa;
	char n;
	cout << "Nhap chu can doi: ";
	cin >> n;
	thuong = n + 32;
	hoa = n - 32;
	if (n < 90)
	{
		cout << "Chu thuong: " << thuong << endl;
	}
	else
	{
		cout << "Chu hoa: " << hoa << endl;

	}
}