
import java.util.Scanner;

public class Main{
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		String strB = "";

		String strA = sc.nextLine();
	//	System.out.println("??\?????????????????? : "+strA);
	//	System.out.println("");


		for(int i = 0; i < strA.length(); i++) {
			strB = strA.substring(i,i+1);

		//	System.out.println("strB.charAt(0) : "+strB.charAt(0));

			//??§????????????true
			if(Character.isUpperCase(strB.charAt(0))) {
				Character.toLowerCase(strB.charAt(0));
				System.out.print(Character.toLowerCase(strB.charAt(0)));
			}
			//?°???????????????§???????????????
			else {
				if(strB == " " || strB == "," || strB == ".") {
					System.out.println(strB);
				}
				else {
					Character.toUpperCase(strB.charAt(0));
					System.out.print(Character.toUpperCase(strB.charAt(0)));
				}
			}

		}
		System.out.println("");
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz