#include <iostream>
#include <algorithm>
#include <cstring>
#include <list>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <chrono>
#include <math.h>
using namespace std;

using lli = long long int;
using Vint = std::vector<int>;
using Vlli = std::vector<lli>;
using Wint = std::vector<Vint>;
using Wlli = std::vector<Vlli>;
using Vbool = std::vector<bool>;
using Wbool = std::vector<Vbool>;
using pii = std::pair<int, int>;
using pll = std::pair<lli, lli>;
template <class T>
using Vec = std::vector<T>;
template <class T>
using Wec = Vec<Vec<T>>;

constexpr int MOD = 1e9 + 7;
constexpr int INFi = 2e9 + 1;
constexpr lli INFl = (lli)(9e18) + 1;
const std::vector<std::pair<int, int>> DXDY = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
constexpr char BR = '\n';

#define DEBUG(x) std::cerr << #x << " = " << x << '\n';
#define FOR(i, a, b) for(int (i) = (a); (i) < (b); ++(i))
#define FOReq(i, a, b) for(int (i) = (a); (i) <= (b); ++(i))
#define rFOR(i, a, b) for(int (i) = (b); (i) >= (a); --(i))
#define FORstep(i, a, b, step) for(int (i) = (a); i < (b); i += (step))
#define REP(i, n) FOR(i, 0, n)
#define rREP(i, n) rFOR(i, 0, (n-1))
#define vREP(ele, vec) for(auto &(ele) : (vec))
#define vREPcopy(ele, vec) for(auto (ele) : (vec))
#define SORT(A) std::sort((A).begin(), (A).end())
#define RSORT(A) std::sort((A).rbegin(), (A).rend())
#define ALL(A) (A).begin(), (A).end()
// 座標圧縮 (for vector) : ソートしてから使うのが一般的 ; SORT(A) => COORDINATE_COMPRESSION(A)
#define COORDINATE_COMPRESSION(A) (A).erase(unique((A).begin(),(A).end()),(A).end())



template <class T> inline int argmin(std::vector<T> vec){return min_element(vec.begin(), vec.end()) - vec.begin();}
template <class T> inline int argmax(std::vector<T> vec){return max_element(vec.begin(), vec.end()) - vec.begin();}
template <class S, class T> inline void chmax(S &a, T b){if(a < b) a = b;}
template <class S, class T> inline void chmin(S &a, T b){if(a > b) a = b;}
template <class T> inline void reverseSORT(Vec<T> &Array){
  std::sort(Array.begin(), Array.end(), std::greater<T>());
}
inline int BitI(int k){return 1 << k;}
inline lli BitL(int k){return 1LL << k;}
inline void putsDouble(double d){printf("%.16lf\n", d);}
template <class T> inline std::string toString(T n){
  if(n == 0) return "0";
  std::string res;
  if(n < 0){n = -n;while(n != 0){res += (char)(n % 10 + '0'); n /= 10;}
  std::reverse(res.begin(), res.end()); return '-' + res;}
  while(n != 0){res += (char)(n % 10 + '0'); n /= 10;} std::reverse(res.begin(), res.end()); return res;
}

namespace MyFunc{
    using LLi = long long int;
    // GCD(a, b) ; a, bの最大公約数を求める関数
    inline LLi gcd(LLi a, LLi b){ while(b != 0){ a %= b; std::swap(a, b);} return a; }
    // LCM(a, b) ; a, bの最小公倍数を求める関数
    inline LLi lcm(LLi a, LLi b){ return (a * b) / MyFunc::gcd(a, b);}
    // 累乗を求める関数
    inline LLi power(LLi a, LLi n){
        LLi res = 1LL, waiting = a;
        while(n != 0LL){ if((n & 1LL) != 0LL) res *= waiting; waiting *= waiting; n >>= 1;}
        return res;
    }
    // 累乗の余りを求める関数
    inline LLi power_mod(LLi a, LLi n, LLi mod_number___ = 1e9 + 7){
        LLi res = 1LL, waiting = a;
        while(n != 0LL){ if((n & 1LL) != 0LL){ res *= waiting; res %= mod_number___;}
            waiting *= waiting; waiting %= mod_number___; n >>= 1; }
        return res;
    }
    // Z/pZ上の逆元を求める関数 (フェルマーの小定理)
    inline LLi inverse_mod(LLi a, LLi mod_number___ = 1e9 + 7){
        return MyFunc::power_mod(a, mod_number___-2);
    }
    inline LLi inverse_mod_euclid(LLi a, LLi mod_number___ = 1e9+7){
        LLi b = mod_number___, u = 1, v = 0;
        while (b != 0) { LLi t = a / b; a -= t * b; std::swap(a, b);
            u -= t * v; std::swap(u, v);}
        u %= mod_number___; if (u < 0) u += mod_number___;
        return u;
    }
    // 素数であるかを判定する関数
    template <typename Integer_type>
    inline bool isPrime(Integer_type n){
        if(n < 2) return false; if(n == 2) return true; if(n % 2 == 0) return false;
        for(Integer_type x = 3; x * x <= n; ++++x) if(n % x == 0) return false;
        return true;
    }
    // 素数であるかの真偽表を返す　: n ≥ 1
    inline std::vector<bool> primeTable(int n){
        std::vector<bool> res(n+1, true); res[0] = false; res[1] = false;
        for(int x = 2; x * x <= n; ++x) if(res[x]){
            for(int i = 2 * x; i <= n; i += x){ res[i] = false; } }
        return std::move(res);
    }
    // 素因数分解したベクトルを返す　; {素因数, 指数}
    template <typename Integer_type>
    inline std::vector<std::pair<Integer_type, int>> prime_factorization(Integer_type n){
        std::vector<std::pair<Integer_type, int>> res(0);
        if(n <= 0) return std::move(res); // 例外処理　: nが 0 以下
        if(n % 2 == 0){
            n /= 2; int cnt = 1; while(n % 2 == 0){ n /= 2; cnt++;}
            res.emplace_back(make_pair(2, cnt));
        }
        Integer_type x = 3;
        while(x * x <= n){
            if(n % x == 0){
                n /= x; int cnt = 1; while(n % x == 0){ n /= x; cnt++; }
                res.emplace_back(make_pair(x, cnt));
            } ++++x;
        } if(n > 1) res.emplace_back(make_pair(n, 1));
        return std::move(res);
    }
}

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


template <long long int mod_number__ = MOD>
struct Modlli{
private:
  using lli = long long int;
  lli number; // 本体
  inline lli power(lli a, lli n){ // a^n (mod mod_number__)を求める
    lli res = 1LL, waiting = a;
    while(n != 0LL){
      if((n & 1LL) != 0LL) res = (res * waiting) % mod_number__;
      waiting = waiting * waiting % mod_number__; n >>= 1;
    }
    return res;
  }
public:
  // +, -, *, /, +=, -=, *=, /= が Modについて定義する
  inline Modlli operator +(const Modlli &that) const {return Modlli((this->number + that.number) % mod_number__);}
  inline Modlli operator +(lli number_int) const {return Modlli((this->number + number_int) % mod_number__);}
  inline void operator +=(const Modlli &that){this->number = (this->number + that.number) % mod_number__;}
  inline void operator +=(lli number_int){this->number = (this->number + number_int) % mod_number__;}
  inline void operator ++(){this->number = (this->number + 1) % mod_number__;}
  inline Modlli operator -(const Modlli &that) const {return Modlli((this->number - that.number + mod_number__) % mod_number__);}
  inline Modlli operator -(lli number_int) const {return Modlli((this->number - number_int + mod_number__) % mod_number__);}
  inline void operator -=(const Modlli &that){this->number = (this->number - that.number + mod_number__) % mod_number__;}
  inline void operator -=(lli number_int){this->number = (this->number - number_int + mod_number__) % mod_number__;}
  inline void operator --(){this->number = (this->number - 1) % mod_number__;}
  inline Modlli operator *(const Modlli &that) const {return Modlli((this->number * that.number) % mod_number__); }
  inline Modlli operator *(lli number_int) const {return Modlli((this->number * number_int) % mod_number__); }
  inline void operator *=(const Modlli &that){this->number = (this->number * that.number) % mod_number__;}
  inline Modlli power(lli n) const { // 冪乗 : number^nを計算
    lli res = 1LL, waiting = this->number;
    while(n != 0LL){
      if((n & 1LL) != 0LL) res = (res * waiting) % mod_number__;
      waiting = waiting * waiting % mod_number__; n >>= 1;
    }
    return Modlli(res);
  }
  inline Modlli inv(void) const {return this->power(mod_number__ - 2);}
  inline Modlli operator /(const Modlli &that) const { return (*this) * that.inv();}
  inline Modlli operator /(lli number_int) const {
    number_int = (number_int >= 0) ? number_int % mod_number__ : (number_int % mod_number__) + mod_number__;
    return Modlli(this->number * power(number_int, mod_number__ - 2) % mod_number__);
  }
  inline void operator /=(const Modlli &that) {
    lli n = mod_number__ - 2;
    lli res = 1LL, waiting = that.number;
    while(n != 0LL){
      if((n & 1LL) != 0LL) res = (res * waiting) % mod_number__;
      waiting = waiting * waiting % mod_number__; n >>= 1;
    }
    this->snumber = (this->number * res) % MOD;
  }
  inline void operator /=(lli number_int) {
    lli n = mod_number__ - 2;
    lli res = 1LL, waiting = number_int;
    while(n != 0LL){
      if((n & 1LL) != 0LL) res = (res * waiting) % mod_number__;
      waiting = waiting * waiting % mod_number__; n >>= 1;
    }
    this->snumber = (this->number * res) % MOD;
  }
  inline Modlli operator %(const Modlli &that) const {return Modlli(this->number % that.number);}
  inline Modlli operator %=(const Modlli &that){this->number %= that.number;}
  // コンストラクタとデコンストラクタ
  Modlli(lli mn){ number = (mn >= 0) ? mn % mod_number__ : (mn % mod_number__) + mod_number__;}
  ~Modlli(void){}
  // 暗黙の型変換 : Modlli => long long int
  // operator long long int() const {return number;}
  inline lli toLong(void){return this->number;}
};
using modint = Modlli<MOD>;

int main(void){
    std::string s; cin >> s;
    const int n = s.size();
    // DP[i][k] := 上から i 桁目まで見ての組み合わせ with 未満フラグ k (0 : 未満, 1 :未確定)
    Wec<modint> DP(n+1, Vec<modint>(2, modint(0)));
    DP[0][1] = 1;
    REP(i, n){
        DP[i+1][0] = DP[i][0] * 3;
        switch(s[i] - '0'){
            case 0:
                DP[i+1][1] = DP[i][1];
                break;
            case 1:
                DP[i+1][0] += DP[i][1];
                DP[i+1][1] = DP[i][1] * 2;
                break;
        }
    }
    modint res = DP[n][0] + DP[n][1];
    cout << res.toLong() << BR;
    return 0;
}

Measured memory_bytes: 6456