#include <bits/stdc++.h>
using namespace std;

int main()
{
	string s;
	string ans = "";
	while (cin >> s)
	{
		for (int i = s.size(); i >= 0; i--)
		{
			if (!(s[i] >= '0' && s[i] <= '9'))
			{
				if (islower(s[i]) != 0)
				{
					ans += char(toupper(s[i]));
				}
				else
				{
					ans += char(tolower(s[i]));
				}
			}
			else
			{
				ans += s[i];
			}
		}
	}
	for (int i = ans.size() - 1; i > 0; i--)
	{
		cout << ans[i];
	}
	return 0;
}