#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        string str;
        cin>>str;
        if(str[0]>='a'&&str[0]<='z')
        {
            str[0]-=32;
            for(int j=1;j<str.size();j++)
            {
                if(str[j]>='A'&&str[j]<='Z')
                    str[j]+=32;
            }
            cout<<str<<endl;
        }
        else if(str[0]>='A'&&str[0]<='Z')
        {
            for(int j=1;j<str.size();j++)
            {
                if(str[j]>='A'&&str[j]<='Z')
                    str[j]+=32;
            }
            cout<<str<<endl;
        }
        else
        {
            for(int j=1;j<str.size();j++)
            {
                if(str[j]>='A'&&str[j]<='Z')
                    str[j]+=32;
            }
            cout<<str<<endl;
        }
    }
    return 0;
}

#include<iostream>
using namespace std;
int n;
string a,b;
bool check(char x){
	if(('a'<=x&&x<='z')||('A'<=x&&x<='Z'))return true;
	else return false;
}
int main(){
    cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a;
		for(int j=0;j<=a.size()-1;j++){
			if(j==0&&check(a[j]))a[j]=toupper(a[j]);
			else if(check(a[j]))a[j]=tolower(a[j]);
		}
		cout<<a<<endl;
	}
	return 0;
}

#include<bits/stdc++.h> using namespace std; char s[10000]; int main() {

int n;
cin >>n; 
while(n--)
{
	cin>>s;
	if(s[0]>='a' && s[0]<='z') 
		s[0]-=32;
	for(int i=1;i<strlen(s);i++)
		if(s[i]>='A' && s[i]<='Z')  
			s[i]+=32;
	cout<<s<<endl;		
}
return 0;

}

#include<bits/stdc++.h> using namespace std; char s[10000]; int main() {

int n;
cin >>n; 
while(n--)
{
	cin>>s;
	if(s[0]>='a' && s[0]<='z') 
		s[0]-=32;
	for(int i=1;i<strlen(s);i++)
		if(s[i]>='A' && s[i]<='Z')  
			s[i]+=32;
	cout<<s<<endl;		
}
return 0;

}

#include <bits/stdc++.h> using namespace std; string s; int n; int main(){ getline(cin, s); for (int i = 1; i <= n; i++){ cin >> s; if (s[0] >= 'a' && s[0] <= 'z'){ s[0] -= 32; } else if (s[i] >= 'A' && s[i] <= 'Z'){ s[i] += 32; } cout << s << endl; } return 0; } //错误的题解！！！😂

#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a[21];
	int n;
	cin >>n; 
	while(n--){
		cin>>a;
		int len=strlen(a); 
		if(a[0]>='a' && a[0]<='z') a[0]-=32;
			for(int i=1;i<len;i++)
				if(a[i]>='A' && a[i]<='Z')  a[i]+=32;
		cout<<a<<endl;		
	}
	return 0;
}