#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main() {
    string phrase;
    // 读取一整行输入
    getline(cin, phrase);
    
    istringstream iss(phrase);
    string word;
    string acronym;
    
    // 逐个提取单词并获取首字母
    while (iss >> word) {
        // 转换首字母为大写并添加到缩写中
        acronym += toupper(word[0]);
    }
    
    // 输出结果
    cout << acronym << endl;
    
    return 0;
}

/**************************************************************
	Problem: 1100
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2140 kb
****************************************************************/