import java.util.*; // For Scanner

public class HalfCaps {
	public static void main(String[] args) {
		halfCaps(new Scanner("The QUick brown foX jumPED over the Sleepy student"));
	}

	public static void halfCaps(Scanner input) {
	    int count = 0;
	    while (input.hasNext()) {
	        count++;
	        String token = input.next();
	        if (count % 2 == 1) {
	            token = token.toLowerCase();
	        } else {
	            token = token.toUpperCase();
	        }
	        System.out.print(token + " ");
	    }
	}
}