#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std;
void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
template<int MOD> struct ModInt {
    static const int Mod = MOD; unsigned x; ModInt() : x(0) { }
    ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
    ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
    int get() const { return (int)x; }
    ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; }
    ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; }
    ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; }
    ModInt &operator/=(ModInt that) { return *this *= that.inverse(); }
    ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
    ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }
    ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }
    ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }
    ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0;
        while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); }
        return ModInt(u); }
    bool operator==(ModInt that) const { return x == that.x; }
    bool operator!=(ModInt that) const { return x != that.x; }
    ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; }
};
template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; };
template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) {
    ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; }
typedef ModInt<1000000007> mint;
/*---------------------------------------------------------------------------------------------------
　　　　　　　　　　　 ∧＿∧
　　　　　 ∧＿∧ 　（´<_｀ ）　 Welcome to My Coding Space!
　　　　 （ ´_ゝ`）　/　 ⌒i     @hamayanhamayan0
　　　　／　　　＼　 　  |　|
　　　 /　　 /￣￣￣￣/　　|
　 ＿_(__ﾆつ/　    ＿/ .| .|＿＿＿＿
　 　　　＼/＿＿＿＿/　（u　⊃
---------------------------------------------------------------------------------------------------*/














int N;
vector<pair<int, ll>> E[201010];
ll xo[201010];
//---------------------------------------------------------------------------------------------------
void dfs(int cu, int pa, ll x) {
    xo[cu] = x;
    fore(p, E[cu]) if (pa != p.first) dfs(p.first, cu, x ^ p.second);
}
//---------------------------------------------------------------------------------------------------
void _main() {
	cin >> N;
	rep(i, 0, N - 1) {
        int a, b; ll c; cin >> a >> b >> c;
		a--; b--;
		E[a].push_back({ b, c });
		E[b].push_back({ a, c });
	}

    dfs(0, -1, 0);

    mint ans = 0;
    rep(bit, 0, 60) {
        ll msk = 1LL << bit;
        ll cnt[2] = { 0, 0 };
        rep(i, 0, N) cnt[(xo[i] & msk) != 0]++;
        ans += mint(msk) * mint(cnt[0]) * mint(cnt[1]);
    }
    cout << ans << endl;
}






// Problem: E - Xor Distances
// Contest: AtCoder - Mynavi Programming Contest 2021（AtCoder Beginner Contest 201）
// URL: https://atcoder.jp/contests/abc201/tasks/abc201_e
// Memory Limit: 1024 MB
// Time Limit: 3000 ms
// 
// Powered by CP Editor (https://cpeditor.org)

#include <bits/stdc++.h>
#define XOX
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;

#define int long long
#define re return
#define beg() begin()
#define cont continue
#define ldb long double
#define db double

#define br break
#define fr first
#define se second
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define mkp make_pair

#define pi pair<int,int>
#define pll pair<ll,ll>
#define pdb pair<db,db>
#define pldb pair<ldb,ldb>

#define vi vector<int>
#define vll vector<ll>
#define vdb vector<db>
#define vldb vector<ldb>
#define vpi vector< pi >
#define vpll vector< pll >

#define mi map<int,int>
#define mdb map<db,db>
#define mldb map<ldb,ldb>

#define si set<int>
#define sdb set<db>
#define sldb set<ldb>

#define test int t; cin>>t; while(t--)
#define scan() int n; cin>>n; int a[n]; for(int i=0;i<n;i++) cin>>a[i]
#define scan2() int n,k; cin>>n>>k; int a[n]; for(int i=0;i<n;i++) cin>>a[i]
#define print(a,n) for(int i=0;i<n;i++) cout<<a[i]<<' '
#define mem(a,v) memset(a,v,sizeof(a))
#define srt(v) sort(v.begin(),v.end())
#define rev(s) reverse(s.begin(),s.end())
#define cn(x) cout<<x<<"\n"
#define cs(x) cout<<x<<" "
#define c(x) cout<<x
#define all(v) v.begin(),v.end()

#define forr(i,a,b) for (int i = (a); i < (b); ++i)
#define rrof(i,a,b) for (int i = (b)-1; i >= (a); --i)


const int MOD = 1e9+7;
const ldb PI = 4*atan((ldb)1);
const int INF = 1e18;
const int NINF = -1e18;

int get_hash(string s){
	int N=1000001;
	int base[N],A=11,MD=1110111110111;
	base[0]=1;

	forr(i,1,N)
	base[i]=(base[i-1]*A)%MD;

	int hs=0;
	forr(i,0,s.size()){
		hs+=(s[i]*base[i]);
		hs%=MD;
	}

	re hs;
}

int power(int a,int n){
	int res=1;

	while(n){
		if(n%2)
		res*=a;
		a*=a;
		n/=2;
	}

	return res;
}

vector<string> vec_splitter(string s) {
	s += ',';
	vector<string> res;
	while(!s.empty()) {
		res.push_back(s.substr(0, s.find(',')));
		s = s.substr(s.find(',') + 1);
	}
	return res;
}
void debug_out(
	vector<string> __attribute__ ((unused)) args,
	__attribute__ ((unused)) int idx,
	__attribute__ ((unused)) int LINE_NUM) { cerr << endl; }
	template <typename Head, typename... Tail>
	void debug_out(vector<string> args, int idx, int LINE_NUM, Head H, Tail... T) {
	if(idx > 0) cerr << ", "; else cerr << "Line(" << LINE_NUM << ") ";
	stringstream ss; ss << H;
	cerr << args[idx] << " = " << ss.str();
	debug_out(args, idx + 1, LINE_NUM, T...);
}
#ifdef XOX
#define debug(...) debug_out(vec_splitter(#__VA_ARGS__), 0, __LINE__, __VA_ARGS__)
#else
#define debug(...) 42
#endif

int root=1;
vector<int>dist;
vector<vector<pair<int,int>>>v;
vector<bool>bl;

void dfs(){
	queue<int>q;
	q.push(root);
	
	while(!q.empty()){
		int x=q.front();
		bl[x]=1;
		q.pop();
		
		for(int i=0;i<v[x].size();i++){
			if(bl[v[x][i].first]==0){
				dist[v[x][i].first]=dist[x]^v[x][i].second;
				q.push(v[x][i].first);
			}
		}
	}
	
	return;
}


int32_t main(){
	fast;
	
	int n;
	cin>>n;
	
	v.resize(n+1);
	for(int i=0;i<n-1;i++){
		int x,y,z;
		cin>>x>>y>>z;
		
		v[x].push_back({y,z});
		v[y].push_back({x,z});
	}
	
	dist.resize(n+1,0);
	bl.resize(n+1,0);
	dfs();
	
	int x=1;
	int ans=0;
	
	for(int i=0;i<=60;i++){
		int cnt1=0,cnt0=0;
		
		for(int j=1;j<=n;j++){
			if(dist[j]%2==1)
			cnt1++;
			
			else
			cnt0++;
			
			dist[j]/=2;
		}
	
		ans=(ans%MOD+(cnt1%MOD*cnt0%MOD)%MOD*(x%MOD))%MOD;
		x*=2;
	}
	
	cout<<ans;
	re 0;
}