import java.util.*;

public class Main {
  public static long MOD = (long)Math.pow(10, 9) + 7;
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String A = sc.next();
    String B = sc.next();
    int p = sc.nextInt();
    long ans = (func(B, p) - func(A, p) + MOD) % MOD;
    int m1 = 0;
    int kosuu = 0;
    int m2 = 0;
    for(int i = 0; i < A.length(); i++) {
      int d = Integer.parseInt(String.valueOf(A.charAt(i)));
      if(d == 3) kosuu++;
      m1 = (m1 + d) % 3;
      m2 = (10 * m2 + d) % p;
    }
    if(((m1 == 0) || (kosuu > 0)) && (m2 != 0)) ans = (ans + 1) % MOD;
    System.out.println(ans);
  }

  public static long func(String X, int p) {
    int len = X.length();
    long[][][][][] dp = new long[len][3][2][p][2];
    int first = Integer.parseInt(String.valueOf(X.charAt(0)));
    dp[0][0][0][0][1]++;
    if(first == 3) {
      dp[0][(first) % 3][1][(first) % p][0]++;
    } else {
      dp[0][(first) % 3][0][(first) % p][0]++;
    }
    for(int i = 1; i < first; i++) {
      if(i == 3) {
        dp[0][i % 3][1][i % p][1]++;
      } else {
        dp[0][i % 3][0][i % p][1]++;
      }      
    }

    for(int i = 1; i < len; i++) {
      int d = Integer.parseInt(String.valueOf(X.charAt(i)));
      for(int j = 0; j < 3; j++) {
        for(int k = 0; k < p; k++) {
          for(int l = 0; l <= d; l++) {
            if(l == d) {
              if(l == 3) {
                dp[i][(j + l) % 3][1][(10 * k + l) % p][0] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][0] + dp[i - 1][j][0][k][0]) % MOD;
              } else {
                dp[i][(j + l) % 3][0][(10 * k + l) % p][0] = (dp[i][(j + l) % 3][0][(10 * k + l) % p][0] + dp[i - 1][j][0][k][0]) % MOD;
              }
            } else {
              if(l == 3) {
                dp[i][(j + l) % 3][1][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][1] + dp[i - 1][j][0][k][0]) % MOD;
              } else {
                dp[i][(j + l) % 3][0][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][0][(10 * k + l) % p][1] + dp[i - 1][j][0][k][0]) % MOD;
              }              
            }
          }
          for(int l = 0; l <= 9; l++) {
            if(l == 3) {
              dp[i][(j + l) % 3][1][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][1] + dp[i - 1][j][0][k][1]) % MOD;
            } else {
              dp[i][(j + l) % 3][0][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][0][(10 * k + l) % p][1] + dp[i - 1][j][0][k][1]) % MOD;
            }
          }
          for(int l = 0; l <= d; l++) {
            if(l == d) {
              dp[i][(j + l) % 3][1][(10 * k + l) % p][0] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][0] + dp[i - 1][j][1][k][0]) % MOD;
            } else {
              dp[i][(j + l) % 3][1][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][1] + dp[i - 1][j][1][k][0]) % MOD;
            }
          }
          for(int l = 0; l <= 9; l++) {
            dp[i][(j + l) % 3][1][(10 * k + l) % p][1] = (dp[i][(j + l) % 3][1][(10 * k + l) % p][1] + dp[i - 1][j][1][k][1]) % MOD;
          }
        }
      }
    }
    long ret = 0;
    for(int k = 1; k < p; k++) {
      for(int l = 0; l < 2; l++) {
        ret = (ret + dp[len - 1][0][0][k][l]) % MOD;
      }
    }
    for(int k = 1; k < p; k++) {
      for(int l = 0; l < 2; l++) {
        for(int j = 0; j < 3; j++) {
          ret = (ret + dp[len - 1][j][1][k][l]) % MOD;
        }
      }
    }
    return ret;
  }
}