import java.util.*;
public class main
{
    public static void main(String[] args)
    {
        Scanner scan=new Scanner(System.in);
        if(scan.hasNextInt()||scan.isLetterOrDigit)
        {
            System.out.println("Invalid input");
            return;
        }
        String s=scan.nextLine();
        char[] ch=s.toCharArray();
        for(int i=0;i<ch.length;i++)
        {
            if(Character.isLetterOrDigit(ch[i]))
            {
                count++;
            }
            else
            {
                System.out.println("Invalid input");
                return;
            }
        }
        if(count==ch.length)
        {
            ch[0]=Character.toUpperCase(ch[0]);
            for(int i=1;i<ch.length;i++)
            {
                if(ch[i]==' ')
                {
                    ch[i+1]=Character.toUpperCase(ch[i+1]);
                }
            }
        }
        System.out.println(ch);
    }
}