#include<bits/stdc++.h>
using namespace std;
int main(){
	 string s;
	 cin>>s;
	 for(int i=0;i<s.size();i++){
	 	if(s[i]>='a'&&s[i]<='z'){
	 		s[i]='z'+(s[i]-'a');
	 	}else if(s[i]>='A'&&s[i]<='Z'){
	 		s[i]='Z'+(s[i]-'A');
		 }
	 }
	 cout<<s[i];
 
	return 0;
}

/**************************************************************
	Problem: 1133
	User: lidongcheng
	Language: C++
	Result: Compile Error
****************************************************************/