#include<bits/stdc++.h> using namespace std; int main(){ char a[110],i; cin>>a; for( i=0;i<strlen(a);i++){ if(a[i]>='a'&&a[i]<='z'){ a[i]-=32; cout<<a[i]; } else if(a[i]>='A'&&a[i]<='Z'){ a[i]+=32; cout<<a[i]; } } return 0; }