import java.util.Scanner;

public interface bookProblem260415morning {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int pages = Integer.parseInt(scan.nextLine());
        int campDays = Integer.parseInt(scan.nextLine());
        int readNormal = Integer.parseInt(scan.nextLine());

        if (campDays == 30 || readNormal == 0){
            System.out.println("never");
            return;
        }
        int readDays = 30 - campDays;
        int readPages = readDays * readNormal;
        int totalMonth = (int)Math.ceil(pages / readPages);
        int years = totalMonth / 12;
        int months = totalMonth % 12;
        System.out.printf("%d years %d months",years,months);
    }
}