#include <bits/stdc++.h>

#define M_PI       3.14159265358979323846   // pi

using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<ll> VI;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> t3;
typedef tuple<ll, ll, ll, ll> t4;
typedef tuple<ll, ll, ll, ll, ll> t5;

#define rep(a,n) for(ll a = 0;a < n;a++)
#define repi(a,b,n) for(ll a = b;a < n;a++)

using namespace std;

static const ll INF = 1e15;

const ll mod = 1000000007;

template<typename T>
void chmin(T & ref, const T  value) {
	if (ref > value) ref = value;
}

int main() {
	//dp[i][j][k]...i回目にて最後がjで複雑度合計がk
	ll n, m, k;
	cin >> n >> m >> k;
	vector<ll> ps(m, 0), qs(m,0), cs(m,0);
	ll u = 0;
	rep(i, m) {
		cin >> ps[i] >> qs[i] >> cs[i];
		ps[i]--;
		qs[i]--;
		u = max(u, ps[i]);
		u = max(u, qs[i]);
	}
	u++;
	vector<vector<vector<ll>>> dp(n+1, vector<vector<ll>>(u, vector<ll>(k+1, 0)));
	rep(i, u) {
		dp[0][i][0] = 1;
	}
	for (int i = 0; i < n-1; i++) {
		for (int j = 0; j < m; j++) {
			for (int p = 0; p <= k; p++) {
				ll np = p + cs[j];
				if (np <= k) {
					(dp[i + 1][qs[j]][np] += dp[i][ps[j]][p]) %= mod;
				}
			}
		}
	}
	ll sum = 0;
	rep(i, u) {
		sum += dp[n-1][i][k];
	}
	cout << sum << endl;
	
	return 0;
}