import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        OutputWriter out = new OutputWriter(outputStream);
        TaskF solver = new TaskF();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskF {
        public void solve(int testNumber, InputReader in, OutputWriter out) {
            String s = in.readString();
            int n = s.length();

            List<Integer> redList = new ArrayList<>();
            List<Integer> blueList = new ArrayList<>();
            for (int i = 0; i < n; i++) {
                if (s.charAt(i) == '0') {
                    redList.add(i);
                    redList.add(i);
                } else if (s.charAt(i) == '1') {
                    redList.add(i);
                    blueList.add(i);
                } else {
                    blueList.add(i);
                    blueList.add(i);
                }
            }

            long MOD = 998244353;

            int r = redList.size();
            int b = blueList.size();
            long[][] dp = new long[r + 1][b + 1];
            dp[0][0] = 1;
            for (int i = 0; i <= r; i++) {
                for (int j = 0; j <= b; j++) {
                    if (i > 0 && redList.get(i - 1) + 1 > i + j) continue;
                    if (j > 0 && blueList.get(j - 1) + 1 > i + j) continue;

                    if (i > 0) dp[i][j] = (dp[i][j] + dp[i - 1][j]) % MOD;
                    if (j > 0) dp[i][j] = (dp[i][j] + dp[i][j - 1]) % MOD;
                }
            }

            out.printLine(dp[r][b]);
        }

    }

    static class InputReader {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;
        private InputReader.SpaceCharFilter filter;

        public InputReader(InputStream stream) {
            this.stream = stream;
        }

        public int read() {
            if (numChars == -1) {
                throw new InputMismatchException();
            }
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (numChars <= 0) {
                    return -1;
                }
            }
            return buf[curChar++];
        }

        public String readString() {
            int c = read();
            while (isSpaceChar(c)) {
                c = read();
            }
            StringBuilder res = new StringBuilder();
            do {
                if (Character.isValidCodePoint(c)) {
                    res.appendCodePoint(c);
                }
                c = read();
            } while (!isSpaceChar(c));
            return res.toString();
        }

        public boolean isSpaceChar(int c) {
            if (filter != null) {
                return filter.isSpaceChar(c);
            }
            return isWhitespace(c);
        }

        public static boolean isWhitespace(int c) {
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

        public interface SpaceCharFilter {
            public boolean isSpaceChar(int ch);

        }

    }

    static class OutputWriter {
        private final PrintWriter writer;

        public OutputWriter(OutputStream outputStream) {
            writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
        }

        public OutputWriter(Writer writer) {
            this.writer = new PrintWriter(writer);
        }

        public void close() {
            writer.close();
        }

        public void printLine(long i) {
            writer.println(i);
        }

    }
}



Measured memory_bytes: 83668