Problem: There is a grid that consists of W \times H cells. The upper-left-most cell is (1, 1). You are standing on the cell of (1,1) and you are going to move to cell of (W, H). You can only move to adjacent lower-left, lower or lower-right cells.

There are obstructions on several cells. You can not move to it. You cannot move out the grid, either. Write a program that outputs the number of ways to reach (W,H) modulo 1,000,000,009. You can assume that there is no obstruction at (1,1).



Input

The first line contains three integers, the width W, the height H, and the number of obstructions N. (1 \leq W \leq 75, 2 \leq H \leq 10^{18}, 0 \leq N \leq 30) Each of following N lines contains 2 integers, denoting the position of an obstruction (x_i, y_i).

The last test case is followed by a line containing three zeros.

Output

For each test case, print its case number and the number of ways to reach (W,H) modulo 1,000,000,009.

Example

Input

2 4 1
2 1
2 2 1
2 2
0 0 0


Output

Case 1: 4
Case 2: 0

Solution (in CPP):

Solution:
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <iostream>
#include <math.h>
#include <assert.h>
#include <vector>
#include <queue>
#include <string>
#include <map>
#include <set>

using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
static const double EPS = 1e-9;
static const double PI = acos(-1.0);

#define REP(i, n) for (ll i = 0; i < (ll)(n); i++)
#define FOR(i, s, n) for (ll i = (s); i < (ll)(n); i++)
#define FOREQ(i, s, n) for (ll i = (s); i <= (ll)(n); i++)
#define FORIT(it, c) for (__typeof((c).begin())it = (c).begin(); it != (c).end(); it++)
#define MEMSET(v, h) memset((v), h, sizeof(v))

typedef vector<ll> Array;
typedef vector<Array> Matrix;
const ll MOD = 1e+9 + 9;
ll w, h, n;
ll m;
ll field[100][100];
ll Y[100];
ll ys[100];
ll xs[100];
Matrix p2[100];

void PrintMatrix(const Matrix &mat) {
  REP(y, mat.size()) {
    REP(x, mat[y].size()) {
      printf("%lld ", mat[y][x]);
    }
    puts("");
  }
  puts("");
}

Matrix Mul(const Matrix &lhs, const Matrix &rhs) {
  const ll h = lhs.size();
  const ll in = lhs[0].size();
  const ll w = rhs[0].size();
  assert(lhs[0].size() == rhs.size());
  Matrix ret(h, Array(w, 0));
  REP(y, h) REP(i, in) REP(x, w) {
    ret[y][x] = (ret[y][x] + lhs[y][i] * rhs[i][x]) % MOD;
  }
  return ret;
}

void Make(ll n) {
  p2[0] = Matrix(n, Array(n, 0));
  p2[1] = Matrix(n, Array(n, 0));
  REP(x, n) {
    p2[0][x][x] = 1;
    FOREQ(dx, -1, 1) {
      if (0 <= x + dx && x + dx < n) { p2[1][x][x + dx] = 1; }
    }
  }
  FOREQ(i, 1, 64) { p2[i + 1] = Mul(p2[i], p2[i]); }
}

void PowMod(ll power, Matrix &vect) {
  ll index = 0;
  while (power > 0) {
    if (power & 1) { vect = Mul(p2[index + 1], vect); }
    index++;
    power >>= 1;
  }
}

int main() {
  int test_case = 0;
  while (scanf("%lld %lld %lld", &w, &h, &n), w|h|n) {
    test_case++;
    Make(w);
    MEMSET(field, 0);
    {
      set<ll> open;
      open.insert(0);
      open.insert(h - 1);
      REP(i, n) {
        scanf("%lld %lld", &xs[i], &ys[i]);
        xs[i]--; ys[i]--;
        while (xs[i] < 0 || xs[i] >= w || ys[i] < 0 || ys[i] >= h) {
          continue;
        }
        open.insert(ys[i] - 1);
        open.insert(ys[i]);
        open.insert(ys[i] + 1);
      }
      map<ll, ll> mapto;
      m = 0;
      FORIT(it, open) {
        if (*it < 0 || *it >= h) { continue; }
        Y[m] = *it;
        mapto[*it] = m++;
      }
      REP(i, n) {
        field[mapto[ys[i]]][xs[i]] = 1;
      }
    }
    Matrix prev(w, Array(1, 0));
    prev[0][0] = 1;
    REP(y, m - 1) {
      Matrix next(w, Array(1, 0));
      if (Y[y + 1] - Y[y] == 1) {
        REP(x, w) {
          FOREQ(dx, -1, 1) {
            if (x + dx < 0 || x + dx >= w) { continue; }
            if (field[y + 1][x + dx] == 1) { continue; }
            next[x + dx][0] += prev[x][0];
          }
        }
      } else {
        next = prev;
        PowMod(Y[y + 1] - Y[y], next);
      }
      prev = next;
    }
    printf("Case %d: %lld\n", test_case, prev[w - 1][0]);
  }
}