C++ :

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int N = 100010;

int main(){
	
	string s[101] , tmp;
	int n;
	cin >> n;
	for(int i = 1 ; i <= n ; ++i) cin >> s[i];
	for(int i = 1 ; i <= n ; i++){
		tmp = s[i];
		if(tmp[0] >= 'a' && tmp[0] <= 'z') tmp[0] = tmp[0] - 32;
		for(int j = 1 ; j < tmp.size() ; j++){
			if(tmp[j] >= 'A' && tmp[j] <= 'Z') tmp[j] = tmp[j] + 32;
		}
		s[i] = tmp;
	}
	
	for(int i = 1 ; i <= n ; i++) cout << s[i] << endl;
	
	
	
	return 0;
}