tijei

#include<bits/stdc++.h>
using namespace std;
int main(){
int n,len;
string a;
cin>>n;
while(n--){
cin>>a;
len = a.length();
for(int i=0,f=1;i<len;i++){
if(f)
if('a'<=a[i]&&a[i]<='z' || 'A'<=a[i]&&a[i]<='Z'){
f=0;
if('a'<=a[i]&&a[i]<='z')
a[i]-=32;
cout<<a[i];
}else{
cout<<a[i];
}else{
if('A'<=a[i]&&a[i]<='Z')
a[i]+=32;
cout<<a[i];
}
}
cout<<endl;
}
return 0;
}