#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

static const ll MOD = 1000000007;

ll dp[305][305][305];

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

  vector<vector<int>> v;
  rep(i,M){
    int p, q, c;
    cin >> p >> q >> c;
    v.push_back({p,q,c});
  }

  rep(i,305) dp[0][0][i] = 1;
  
  rep(i,N-1){
    rep(j,K+1){
      rep(k,v.size()){
        int p = v[k][0];
        int q = v[k][1];
        int c = v[k][2];
        if(j+c <= K){
          dp[i+1][j+c][q] += dp[i][j][p];
          dp[i+1][j+c][q] %= MOD;
        }
      }
    }
  }
  
  ll ret = 0;
  rep(i,305){
    ret += dp[N-1][K][i];
    ret %= MOD;
  }
  cout << ret << endl;
  
  return 0;
}