#include<iostream> using namespace std; int main() { /** char a; cin>>a; if(a =='Y'){ cout<<'A'; }else { if(a =='Z'){ cout<<'B'; }else{ cout<<char(a+2); } } **/ char a; cin>>a; if(a >= 'A'&& a <='Z') cout<<char(a+32); if(a>='a'&& a<='z') cout<<char(a-32); return 0; }