// includes #include // macros #define ll long long int #define pb emplace_back #define mk make_pair #define pq priority_queue #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define rep(i, n) FOR(i, 0, n) #define rrep(i, n) for(int i=((int)(n)-1);i>=0;i--) #define irep(itr, st) for(auto itr = (st).begin(); itr != (st).end(); ++itr) #define irrep(itr, st) for(auto itr = (st).rbegin(); itr != (st).rend(); ++itr) #define vrep(v, i) for(int i = 0; i < (v).size(); i++) #define all(x) (x).begin(),(x).end() #define sz(x) ((int)(x).size()) #define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end()) #define FI first #define SE second #define dump(a, n) for(int i = 0; i < n; i++)cout << a[i] << "\n "[i + 1 != n]; #define dump2(a, n, m) for(int i = 0; i < n; i++)for(int j = 0; j < m; j++)cout << a[i][j] << "\n "[j + 1 != m]; #define bit(n) (1LL<<(n)) #define INT(n) int n; cin >> n; #define LL(n) ll n; cin >> n; #define DOUBLE(n) double n; cin >> n; using namespace std; template bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} return 0;} template bool chmin(T &a, const T &b){if(a > b){a = b; return 1;} return 0;} template istream &operator>>(istream &is, vector &vec){for(auto &v: vec)is >> v; return is;} template ostream &operator<<(ostream &os, const vector& vec){for(int i = 0; i < vec.size(); i++){ os << vec[i]; if(i + 1 != vec.size())os << " ";} return os;} template ostream &operator<<(ostream &os, const set& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const unordered_set& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const multiset& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const unordered_multiset& st){for(auto itr = st.begin(); itr != st.end(); ++itr){ os << *itr; auto titr = itr; if(++titr != st.end())os << " ";} return os;} template ostream &operator<<(ostream &os, const pair &p){os << p.first << " " << p.second; return os;} template ostream &operator<<(ostream &os, const map &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;} template ostream &operator<<(ostream &os, const unordered_map &mp){for(auto itr = mp.begin(); itr != mp.end(); ++itr){ os << itr->first << ":" << itr->second; auto titr = itr; if(++titr != mp.end())os << " "; } return os;} // types typedef pair P; typedef pair Pl; typedef pair Pll; typedef pair Pd; typedef complex cd; // constants const int inf = 1e9; const ll linf = 1LL << 50; const double EPS = 1e-10; const int mod = 1e9 + 7; const int dx[4] = {-1, 0, 1, 0}; const int dy[4] = {0, -1, 0, 1}; // solve ll dp[10010][3][8][2]; ll calc(string &a){ if(sz(a) == 0)return 0; vector A(sz(a)); rep(i, sz(a))A[i] = int(a[i] - '0'); int n = sz(a); rep(i, n + 1)rep(j, 3)rep(k, 8)rep(l, 2)dp[i][j][k][l] = 0; int tsum = 0; int bsum = 0; bool b = false; rep(i, n){ rep(j, 10){ rep(k, 3){ rep(l, 8){ rep(m, 2){ int k2 = (k + j) % 3; int l2 = (l * 10 + j) % 8; if(j == 3){ (dp[i+1][k2][l2][1] += dp[i][k][l][m]) %= mod; }else{ (dp[i+1][k2][l2][m] += dp[i][k][l][m]) %= mod; } } } } } rep(j, A[i]){ int k2 = (tsum + j) % 3; int l2 = (bsum * 10 + j) % 8; int m = (b || j == 3) ? 1: 0; (dp[i+1][k2][l2][m] += 1) %= mod; } bsum = (bsum * 10 + A[i]) % 8; tsum = (tsum + A[i]) % 3; if(A[i] == 3)b = true; /*rep(j, 3){ rep(k, 8){ rep(l, 2){ cout << i << " " << j << " " << k << " " << l << " " << dp[i+1][j][k][l] << endl; } } }*/ } ll res = 0; if((tsum % 3 == 0 || b) && bsum % 8 > 0)res++; FOR(i, 1, 8){ rep(j, 2){ res = (res + dp[n][0][i][j]) % mod; } FOR(j, 1, 3){ res = (res + dp[n][j][i][1]) % mod; } } return res; } int main(int argc, char const* argv[]) { ios_base::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(20); string a, b; cin >> a >> b; int cnt = 0; rep(i, sz(a))if(a[i] == '0')cnt++; string t = ""; if(a[0] == 1 && cnt + 1 == sz(a)){ rep(i, sz(a) - 1)t += "9"; }else{ bool f = false; for(int i = sz(a) - 1; i >= 0; i--){ if(a[i] == '0'){ if(!f)t += "9"; else t += "0"; }else{ if(!f){ t += char(a[i] - 1); f = true; }else{ t += a[i]; } } } while(t.back() == '0')t.pop_back(); reverse(all(t)); } ll res = (calc(b) - calc(t)) % mod; if(res < 0)res += mod; cout << res << endl; return 0; }