#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define itrfor(itr,A) for(auto itr = A.begin(); itr !=A.end();itr++)
typedef long long llong;
char moji[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
char moji2[26]={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
char moji3[10]={'0','1','2','3','4','5','6','7','8','9'};
#define Sort(a) sort(a.begin(),a.end());
#define Reverse(a) reverse(a.begin(),a.end());
#define print(a) cout << a << endl;
#define MOD llong(1e9 +7)
#define MAX 20005

int main(){
    llong ans[2];
    string S[2];
    int p;
    cin >> S[0] >> S[1] >> p;
    REP(iiii,2){
        string s;
        s = S[iiii];
        int n = s.length();
        llong dp[MAX][2][2][3][800];
        REP(i,n+1) REP(j,2) REP(k,2) REP(ii,3) REP(jj,p) dp[i][j][k][ii][jj] = 0;
        dp[0][0][0][0][0] = 1;

        FOR(i,1,n+1){
            REP(j,2){
                REP(ii,2){
                    REP(jj,3){
                        REP(kk,p){
                            int lim = j ? 9 : s[i-1] - '0';
                            REP(k,lim +1){
                                dp[i][j or k < lim][ii or k == 3][(jj + k) % 3][(kk * 10 + k)%p] += dp[i-1][j][ii][jj][kk];
                                dp[i][j or k < lim][ii or k == 3][(jj+k) % 3][(kk * 10 + k)%p] %=MOD;
                            }
                        }
                    }
                }

            }
        }
        ans[iiii] = 0;
        REP(i,2){
            if(iiii == 0 and i == 0) continue;
            REP(j,2) REP(k,3) FOR(ii,1,p){
                if(j== 0 and k != 0) continue;
                ans[iiii] += dp[n][i][j][k][ii];
                ans[iiii] %=MOD;
            }
        }

    }
    
    cout <<  (MOD + ans[1] - ans[0]) % MOD << endl;

}