#include <iostream>
using namespace std;
int main(){
    string s;cin>>s;
    for(int i = 0; s.size() > i; i++){
        if('A' <= s[i] && s[i] <= 'Z'){
            cout << (char)(s[i] - ('A'-'a'));
        }else{
            cout << s[i];
        }
    }
    cout << endl;
}