hdu 1048 The Hardest Problem Ever

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] s = "VWXYZABCDEFGHIJKLMNOPQRSTU".toCharArray();
        while (sc.hasNext()) {
            String st = sc.nextLine();
            if (st.compareTo("ENDOFINPUT") == 0)
                break;
            String str = sc.nextLine();
            String en = sc.nextLine();
            char[] a = str.toCharArray();
            for (int i = 0; i < a.length; i++) {
                if (a[i] >= ‘A‘ && a[i] <= ‘Z‘)
                    System.out.print(s[a[i] - ‘A‘]);
                else
                    System.out.print(a[i]);
            }
            System.out.println();

        }
    }
}