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: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static string InputPattern = "InputX";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("atcoder beginner contest");
            //ABC
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("resident register number");
            //RRN
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("k nearest neighbor");
            //KNN
        }
        else if (InputPattern == "Input4") {
            WillReturn.Add("async layered coding");
            //ALC
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        string[] wkArr = InputList[0].Split(' ').ToArray();

        var sb = new System.Text.StringBuilder();
        sb.Append(wkArr[0].ToUpper()[0]);
        sb.Append(wkArr[1].ToUpper()[0]);
        sb.Append(wkArr[2].ToUpper()[0]);

        Console.WriteLine(sb.ToString());
    }
}