#include <iostream> using namespace std; int main() { char a[20]; int i = 0; cin>>a; for(;a[i];i++) { if(a[i] >= 'a'&&a[i] <= 'z') a[i] -= 32; else if(a[i] >= 'A'&&a[i] <= 'Z') a[i] += 32; } for(i = 0;a[i];i++) cout<<a[i]; cout<<endl; return 0; }