import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.NoSuchElementException;

class Main {
	
	public static void main(String[] args) {
		new Main().run();
	}

	final long mod=998244353;

	long f(char[] a, int id) {
		int n=a.length;
		if (id == n) {
			int sum=0;
			for (char c : a) {
				sum+=c-'0';
			}
			if (sum%3==0) return 1;
			else return 0;
		}
		long ret=0;
		if (a[id]=='?') {
			a[id]='0';
			ret+=4*f(a, id+1);
			ret%=mod;
			
			a[id]='1';
			ret+=3*f(a, id+1);
			ret%=mod;
			
			a[id]='2';
			ret+=3*f(a, id+1);
			ret%=mod;

			a[id]='?';
		} else {
			ret=f(a, id+1);
		}
		return ret;
	}
	
	void brute(int N, char[] str) {
		long ans=0;
		for (int L=0;L<N;++L) {
			for (int R=L;R<N;++R) {
				ans+=f(Arrays.copyOfRange(str, L, R+1), 0);
				ans%=mod;
			}
		}
		System.out.println(ans);
	}
	
	void solve() {

		FastScanner sc=new FastScanner();
		PrintWriter pw=new PrintWriter(System.out);
		int N=sc.nextInt();
		char[] str=sc.next().toCharArray();
		
		//brute(N, str);
		
		long[] cnt=new long[3];
		cnt[0]=0;
		long ans=0;
		for (int i=0;i<N;++i) {
			long[] ncnt=new long[3];
			for (int pre=0;pre<3;++pre) {
				for (int add=0;add<=9;++add) {
					if (str[i]!='?' && add != str[i]-'0') continue;
					ncnt[(pre+add)%3]+=cnt[pre];
					ncnt[(pre+add)%3]%=mod;
				}
			}
			for (int add=0;add<=9;++add) {
				if (str[i]!='?' && add != str[i]-'0') continue;
				ncnt[add%3]++;
				ncnt[add%3]%=mod;
			}
			ans=(ans+ncnt[0])%mod;
			cnt=ncnt;
		}
		System.out.println(ans);
		pw.close();
	}
	
	void run() {
		solve();
	}
	
	static void tr(Object...objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}




class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}