#include <bits/stdc++.h>
using namespace std;
int main() {
    #ifdef DEBUG
    std::ifstream in("/home/share/inputf.in");
    std::cin.rdbuf(in.rdbuf());
    #endif
    string S;
    cin >> S;
    for(int i = 0; i < S.length(); i++) {
        S[i] = S[i] ^ 0x20;
    }
    cout << S << endl;
    return 0;
}