ruu567

#include<bits/stdc++.h>
using namespace std;
int main(){
char a,b;
cin>>a;
b=int(a);
if(b>=97&&b){
b-=32;
cout<<char(b);
return 0;
}
if(b>=65&&b<=90){
b+=32;
cout<<char(b);
}
return 0;
}tim87toi