import java.util.Scanner;

public class FirstLetters {
    public static void main(String[] args) {
        String text="";
        String line,output="";
        Scanner scan = new Scanner(System.in);

        System.out.println("Enter a blank line to terminate:");
        do {
            line = scan.nextLine();
            text += line;
        } while(!(line.length()==0));

        for (int i=0;i<text.length();i++) {
            char c = text.charAt(i);
            if (c>='A' && c<='Z') {
                output = output+c;
            }
        }
        System.out.println("Capitals: "+output);
    }
}