#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <climits>
#include <map>
#include <queue>
#include <set>
#include <cstring>
#include <vector>

using namespace std;
typedef long long ll;

const ll MOD = 1000000007;
ll dp[301][301][301];

int main() {
  int N, M, K;
  cin >> N >> M >> K;

  int P[M];
  int Q[M];
  int C[M];
  memset(dp, 0, sizeof(dp));

  for (int i = 0; i < M; ++i) {
    cin >> P[i] >> Q[i] >> C[i];

    dp[2][Q[i]][C[i]]++;
  }

  for (int i = 2; i < N; ++i) {
    for (int j = 0; j < M; ++j) {
      for (int k = K - C[j]; k >= 0; --k) {
        int nk = k + C[j];

        // fprintf(stderr, "i: %d, (%d -> %d) k: %d, cnt: %lld\n", i, P[j], Q[j], nk, dp[i][P[j]][k]);
        dp[i + 1][Q[j]][nk] += dp[i][P[j]][k];
        dp[i + 1][Q[j]][nk] %= MOD;
      }
    }
  }

  ll ans = 0;

  for (int i = 0; i <= 300; ++i) {
    ans += dp[N][i][K];
    ans %= MOD;
  }

  cout << ans << endl;

  return 0;
}