dp

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

public class Main{
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        char[] ch = sc.nextLine().toCharArray();

        int[]dp = new int[ch.length];
        dp[0] = 1;
        dp[1] = 2;
        for(int i=2;i<ch.length;++i) {
            dp[i] += dp[i-1];
            //看看前面那个能否 <=26
            if(ch[i-1]<='2'&& ch[i]<='6') {
                dp[i]+=dp[i-2];
            }
        }
        System.out.println(dp[ch.length-1]);


    }

    public static int max(int... a) {
        return Arrays.stream(a).max().getAsInt();
    }



}