#include <iostream>
#include <vector>
#include <cmath>
#include <memory>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <iomanip>
#include <bitset>
#include <string>
#include <list>
#include <deque>
#include <stack>
#include <limits>
#include <numeric>
#include <unordered_map>
#include <unordered_set>
#include <chrono>
#include <random>

using namespace std;
using ll = long long;
using ull = unsigned long long;
template <class T>
using max_heap = priority_queue<T>;
template <class T>
using min_heap = priority_queue<T, vector<T>, greater<>>;
ll ll_min = numeric_limits<ll>::min();
ll ll_max = numeric_limits<ll>::max();
ll ALPHABET_N = 26;
static const ll INF = ll_max / 10;
#define rep(i, n) for (ll i = (ll)0; i < (ll)n; i++)
#define rep_(i, k, n) for (ll i = (ll)k; i < (ll)n; i++)
#define all(a) a.begin(), a.end()

int main()
{
	string s1,s2,s3;
	cin>>s1>>s2>>s3;
	string ans;
	ans += toupper(s1[0]);
	ans += toupper(s2[0]);
	ans += toupper(s3[0]);
	cout<<ans<<endl;
	return 0;
}