#include<bits/stdc++.h>
using namespace std;
int main(){
    string s;
    getline(cin,s);
    for(int i=0;i<s.size();i++){
        if(s[i]<'A'||s[i]>'z')cout<<s[i];
        else if(s[i]>='A'&&s[i]<='Z')cout<<char('Z'+'A'-s[i]);
        else cout<<char('z'+'a'-s[i]);
    }
	return 0;
}
/**************************************************************
	Problem: 1133
	User: houlingqi2
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2076 kb
****************************************************************/