//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<n; ++i)
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
using namespace std;
using ll = int64_t;
using ld = long double;
using P = pair<int, int>;
using vs = vector<string>;
using vi = vector<int>;
using vvi = vector<vi>;
template<class T> using PQ = priority_queue<T>;
template<class T> using PQG = priority_queue<T, vector<T>, greater<T> >;
const int INF = 100010001;
const ll LINF = (ll)INF*INF*10;
template<typename T1, typename T2>
inline bool chmax(T1 &a, T2 b) {return a < b && (a = b, true);}
template<typename T1, typename T2>
inline bool chmin(T1 &a, T2 b) {return a > b && (a = b, true);}
template<typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) { return is >> p.first >> p.second;}
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const pair<T1, T2> &p) { return os << p.first << ' ' << p.second;}

const int mod = 1000000007;
//const int mod = 998244353;

struct mint {
  int64_t x;
  mint(int64_t x=0):x((x%mod+mod)%mod){}
  mint operator-() const { return mint(-x);}
  mint& operator+=(const mint a) {
    if ((x += a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator-=(const mint a) {
    if ((x += mod-a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this;}
  mint operator+(const mint a) const { return mint(*this) += a;}
  mint operator-(const mint a) const { return mint(*this) -= a;}
  mint operator*(const mint a) const { return mint(*this) *= a;}
  mint pow(int64_t t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }

  //for prime mod
  mint inv() const { return pow(mod-2);}
  mint& operator/=(const mint a) { return *this *= a.inv();}
  mint operator/(const mint a) {return mint(*this) /= a;}
};

istream& operator>>(istream& is, mint& a) { return is >> a.x;}
ostream& operator<<(ostream& os, const mint& a) { return os << a.x;}

const int N = 216;

//head

int k, m;
ll n;
int p[N], q[N], r[N];

using V = vector<mint>;
using M = vector<V>;

M mul(const M& a, const M b) {
  int n = a.size();
  M res(n, V(n));
  rep(i, n) rep(j, n) rep(k, n) {
    res[i][j] += a[i][k] * b[k][j];
  }
  return res;
}
V mul(const M& a, const V& b) {
  int n = a.size();
  V res(n);
  rep(i, n) rep(j, n) {
    res[i] += a[i][j] * b[j];
  }
  return res;
}
M pow(const M& a, ll p) {
  int n = a.size();
  if(!p) {
    M res(n, V(n));
    rep(i, n) res[i][i] = 1;
    return res;
  }
  M res = pow(a, p>>1);
  res = mul(res, res);
  if(p&1) res = mul(a, res);
  return res;
}

inline int num(int j, int k_) {
  return j*k + k_;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  
  cin >> k >> m >> n;
  int uu = k*k;

  rep(i, m) cin >> p[i] >> q[i] >> r[i];

  V cc(uu);
  M mat(uu, V(uu));

  rep(i, m) {
    p[i]--; q[i]--; r[i]--;
    if(!p[i]) {
      cc[num(0, q[i])] = 1;
    }
    mat[num(q[i], r[i])][num(p[i], q[i])] = 1;
  }

  mat = pow(mat, n-2);
  cc = mul(mat, cc);

  mint ans;
  rep(iu, k) {
    ans += cc[num(iu, 0)];
  }

  cout << ans << endl;
}