Problem:
Score : 100 points

Problem Statement

You are given three words s_1, s_2 and s_3, each composed of lowercase English letters, with spaces in between.
Print the acronym formed from the uppercased initial letters of the words.

Constraints

s_1, s_2 and s_3 are composed of lowercase English letters.

1 ≤ |s_i| ≤ 10 (1≤i≤3)

Input

Input is given from Standard Input in the following format:

s_1 s_2 s_3

Output

Print the answer.

Sample Input 1

atcoder beginner contest

Sample Output 1

ABC

The initial letters of atcoder, beginner and contest are a, b and c. Uppercase and concatenate them to obtain ABC.

Sample Input 2

resident register number

Sample Output 2

RRN

Sample Input 3

k nearest neighbor

Sample Output 3

KNN

Sample Input 4

async layered coding

Sample Output 4

ALC

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test1_CutAndBig
{
    class Program
    {
        static void Main(string[] args)
        {
            //入力
            Console.Write("文字列1を入力してください : ");
            String s1 = Console.ReadLine();

            //クラス、メソッド呼び出し
            ClassA classA = new ClassA();
            Console.WriteLine(classA.CutAndBig(s1));
            Console.WriteLine("何かキーを押してください。");
            Console.ReadKey();
        }
    }

    class ClassA
    {
        public String CutAndBig(string s1)
        {
            
            String[] work = s1.Split(' ');
            String work2 = work[0].Substring(0, 1); 

            for (int i = 1; i < 3; i++)
            {
                work2 = work2 + work[i].Substring(0, 1);
            }

            return work2.ToUpper();
        }

    }
}