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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	string s; cin>>s;
	int diff='a'-'A';
	for(auto&&i:s){
		cout<<(i>='a'&&i<='z'?(char)(i-diff):(char)(i+diff));
	}
	cout<<"\n"s;
}