#include<iostream>
#include<string>
#include<algorithm>
using namespace std;

string s;
char a[1100];
int cnt;
int main(){
	while(cin>>s)
	{
		if(s[0]>='a'&&s[0]<='z')
		{
			int len=s.size();	
			for(int i=0;i<len;i++)
			{
				cout<<char(s[i]-32);
			}
			cout<<" ";
		}
		else if(s[0]>='A'&&s[0]<='Z')
		{
			int len=s.size();	
			for(int i=0;i<len;i++)
			{
				cout<<char(s[i]+32);
			}	
			cout<<" ";
		}
		else if(s[0]>='0'&&s[0]<='9')
		{
			int len=s.size();	
			reverse(s.begin(),s.end());
			cout<<s; 
			cout<<" ";
		}
	}
	return 0;
}