import java.util.Scanner;

public class Penulis2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String kalimat = in.nextLine();
        int banyak = kalimat.length();
        int tengah=banyak/2;
        if (banyak>20)
            System.out.println("ERROR");
        else if (banyak%2!=0){
            String a = kalimat.substring(tengah+1,banyak);
            String b = kalimat.substring(0,tengah)+"Ganjil"+a;
            System.out.print(b);
        }
        else {
            String a = kalimat.substring(tengah+1,banyak-1);
            String b = kalimat.substring(0,tengah-1)+"Genap"+a;
            System.out.printf("%20s",b);
        }

    }
}