#include <iostream>

#include <iostream>
#include <string>
using namespace std;
int main() {
int a;
string b;
cin >> a >> b;
for (int i = 0; i < a; i++) {
if (b[i] >= 'A' && b[i] <= 'Z') b[i] = b[i] +32;
else if (b[i] >= 'a' && b[i] <= 'z') b[i] = b[i] -32;
else if (b[i] >= '0' && b[i] <= '9') b[i] = '*';
cout << b << endl;
return 0;
}