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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StreamTokenizer;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Igors
 */
public class aprilfirst3 {
    public static void main (String[] args) throws IOException{
        String alf=(" abcdefghijklmnopqrstuvwxyz");
        StreamTokenizer s=new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
        s.nextToken();
        String inp=s.sval;
        s.nextToken();
        int n=(int)s.nval;
        for (int i=0;i<inp.length();i++){
            char x=inp.charAt(i);
            for(int j=0;j<=n;j++){
                if (alf.charAt(j)==x){
                    x=Character.toUpperCase(x);
                }
                
            }
            System.out.print(x);
        }
    }
}
