#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: zhouhongyi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/