import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;

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

    static class ESumEqualsXor {
        public void solve(int testNumber, InputReader s, PrintWriter w) {
            char[] a = ("0" + s.next()).toCharArray();
            int n = a.length - 1;
            long mod = (long) 1e9 + 7;
            long[][] dp = new long[n + 1][2];
            dp[0][0] = 1;
            for (int i = 1; i <= n; i++) {
                if (a[i] == '0') {
                    dp[i][0] = dp[i - 1][0];
                    dp[i][1] = dp[i - 1][1] * 3 % mod;
                } else {
                    dp[i][0] = dp[i - 1][0] * 2 % mod;
                    dp[i][1] = (dp[i - 1][1] * 3 % mod + dp[i - 1][0]) % mod;
                }
            }
            w.println((dp[n][0] + dp[n][1]) % mod);
        }

    }

    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 nextString() {
            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 String next() {
            return nextString();
        }

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

        }

    }
}



Measured memory_bytes: 25684