include <bits/stdc++.h>

include

include

using namespace std;

int main() {

string s;
getline(cin, s);
for(char &c : s){
	if(isupper(c)){
		c = tolower(c);
	}else if(islower(c)){
		c = toupper(c);
	}	
}
reverse(s.begin(), s.end());
cout << s;
return 0;

}