import java.util.Scanner;

public class Main {
	  public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int n = sc.nextInt();
	        char[] s = sc.next().toCharArray();
	        long[] dp = new long[3];
	        long[] e = new long[3];
	        long ans = 0;
	        long mod = 998244353;
	        for(int i = 0; i < n; i++){
	        	if(s[i] == '?'){
	        		for(int j = 0; j < 3; j++){
	        			for(int k = 0; k < 10; k++){
	        				e[(j + k) % 3] += dp[j];
	        				e[(j + k) % 3] %= mod;
	        			}
	        		}
	        		for(int k = 0; k < 10; k++){
	        			e[k % 3] += 1;
	        		}
	        	}
	        	else{
	        		int now = s[i] - '0';
	        		for(int j = 0; j < 3; j++){
	        			e[(j + now) % 3] += dp[j];
	        			e[(j + now) % 3] %= mod;
	        		}
	        		e[now % 3] += 1;
	        	}
	        	ans += e[0];
	        	ans %= mod;
	        	dp[0] = e[0];
	        	dp[1] = e[1];
	        	dp[2] = e[2];
	        	e[0] = 0;
	        	e[1] = 0;
	        	e[2] = 0;
	        }
	        System.out.println(ans);

	    }
}