import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while(scanner.hasNext()) {
char letter = scanner.next().charAt(0);
if((letter >= 'A' && letter <= 'Z') || (letter >= 'a' && letter <= 'z')) {
System.out.println(letter + " is an alphabet.");
} else {
System.out.println(letter + " is not an alphabet.");
}
}
}
}