import java.util.Scanner;

public class StringLoop {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		
		//sentinel loop for strings
		//init
		System.out.println("Enter a string. \"quit\" to quit");
		//trim method
		String line = input.nextLine().trim();
		
		//condition
		while(!line.equalsIgnoreCase("quit")) {  // line != "quit" doesn't work
			//repeat
			String upperCase = line.toUpperCase();
			System.out.println(upperCase);
			
			//next
			System.out.println("Enter a string. \"quit\" to quit");
			line = input.nextLine().trim();
		}
	}

}