import java.io.InputStream; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator; import java.util.InputMismatchException; import java.util.NoSuchElementException; import java.math.BigInteger; public class Main{ static PrintWriter out; static InputReader ir; static final long MOD=(long)1e9+7; static void solve(){ char[] a=ir.next().toCharArray(); char[] b=minusOne(ir.next().toCharArray()); int p=ir.nextInt(); out.println((calc(a,p)-calc(b,p)+MOD)%MOD); } public static long calc(char[] s,int p){ int dig=Integer.toString(p).length(); long[][][][][] dp=new long[2][2][2][3][8]; dp[0][0][0][0][1]=1; for(int i=0;is.length-dig-3){ for(int m8=0;m8<8;m8++){ if(i>s.length-dig){ if(m8==0&&k==0) dp[next][next_j][next_l][nm3][0]=(dp[next][next_j][next_l][nm3][0]+dp[now][j][l][m3][0])%MOD; else dp[next][next_j][next_l][nm3][1]=(dp[next][next_j][next_l][nm3][1]+dp[now][j][l][m3][m8])%MOD; } else{ int nm8=(m8+(int)Math.pow(10,s.length-dig-i)*k)%8; dp[next][next_j][next_l][nm3][nm8]=(dp[next][next_j][next_l][nm3][nm8]+dp[now][j][l][m3][m8])%MOD; } } } else dp[next][next_j][next_l][nm3][1]=(dp[next][next_j][next_l][nm3][1]+dp[now][j][l][m3][1])%MOD; } } } } for(int j=0;j<2;j++){ for(int k=0;k<2;k++){ for(int l=0;l<3;l++){ Arrays.fill(dp[now][j][k][l],0); } } } } long ret=0; for(int i=0;i<2;i++){ for(int j=0;j<2;j++){ for(int k=0;k<3;k++){ for(int l=0;l<8;l++){ if((j==1||k==0)&&l!=0) ret+=dp[s.length%2][i][j][k][l]; } } } } return (int)(ret+(MOD-1))%MOD; } public static char[] minusOne(char[] s){ char[] ret=new char[s.length]; boolean f=false; for(int i=s.length-1;i>=0;i--){ if(!f){ if(s[i]!='0'){ ret[i]=(char)(s[i]-1); f=true; } else ret[i]='9'; } else ret[i]=s[i]; } return ret; } public static void main(String[] args) throws Exception{ ir=new InputReader(System.in); out=new PrintWriter(System.out); solve(); out.flush(); } static class InputReader { private InputStream in; private byte[] buffer=new byte[1024]; private int curbuf; private int lenbuf; public InputReader(InputStream in) {this.in=in; this.curbuf=this.lenbuf=0;} public boolean hasNextByte() { if(curbuf>=lenbuf){ curbuf= 0; try{ lenbuf=in.read(buffer); }catch(IOException e) { throw new InputMismatchException(); } if(lenbuf<=0) return false; } return true; } private int readByte(){if(hasNextByte()) return buffer[curbuf++]; else return -1;} private boolean isSpaceChar(int c){return !(c>=33&&c<=126);} private void skip(){while(hasNextByte()&&isSpaceChar(buffer[curbuf])) curbuf++;} public boolean hasNext(){skip(); return hasNextByte();} public String next(){ if(!hasNext()) throw new NoSuchElementException(); StringBuilder sb=new StringBuilder(); int b=readByte(); while(!isSpaceChar(b)){ sb.appendCodePoint(b); b=readByte(); } return sb.toString(); } public int nextInt() { if(!hasNext()) throw new NoSuchElementException(); int c=readByte(); while (isSpaceChar(c)) c=readByte(); boolean minus=false; if (c=='-') { minus=true; c=readByte(); } int res=0; do{ if(c<'0'||c>'9') throw new InputMismatchException(); res=res*10+c-'0'; c=readByte(); }while(!isSpaceChar(c)); return (minus)?-res:res; } public long nextLong() { if(!hasNext()) throw new NoSuchElementException(); int c=readByte(); while (isSpaceChar(c)) c=readByte(); boolean minus=false; if (c=='-') { minus=true; c=readByte(); } long res = 0; do{ if(c<'0'||c>'9') throw new InputMismatchException(); res=res*10+c-'0'; c=readByte(); }while(!isSpaceChar(c)); return (minus)?-res:res; } public double nextDouble(){return Double.parseDouble(next());} public BigInteger nextBigInteger(){return new BigInteger(next());} public int[] nextIntArray(int n){ int[] a=new int[n]; for(int i=0;i