#include<iostream>
#include<cstring>
using namespace std;
char a[100001];
int main(){
	cin.getline(a,100001);
	int len=strlen(a);
	for(int i=0;i<len;i++){
		if(a[i]>='a'&&a[i]<='z') a[i]-=32;
		if(a[i]>='A'&&a[i]<='Z') a[i]+=32;
	}
	for(int i=len-1;i>=0;i--){
		cout<<a[i];
	}
	cout<<endl;
	return 0;
}