#include<iostream>
#include<cmath>
#include<string>
#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
	long long n,i,j,k;
	string s,t[10005];
	cin>>k;
	for(i=1;i<=k;i++)
	{
		cin>>s;
		n=s.size();
		for(j=0;j<n;j++)
	    {
		if(s[0]>='a'&&s[0]<='z')s[j]-=32;
		else if(j>0&&s[j]>='A'&&s[j]<='Z')s[j]+=32;
	    } 
	    t[i]=s; 
	}
	for(i=1;i<=n;i++)
	    cout<<t[i]<<endl; 
	
}