import sys
#sys.setrecursionlimit(10 ** 6)
INF = float('inf')
#10**20,2**63に変えるのもあり
MOD = 10**9 + 7
MOD2 = 998244353
from collections import defaultdict
class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n

    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        if self.parents[x] > self.parents[y]:
            x, y = y, x

        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return len(self.roots())

    def all_group_members(self):
        group_members = defaultdict(list)
        for member in range(self.n):
            group_members[self.find(member)].append(member)
        return group_members

    def __str__(self):
        return '\n'.join(f'{r}: {m}' for r, m in self.all_group_members().items())
def solve():
    def II(): return int(sys.stdin.readline())
    def LI(): return list(map(int, sys.stdin.readline().split()))
    def LC(): return list(input())
    def IC(): return [int(c) for c in input()]
    def MI(): return map(int, sys.stdin.readline().split())
    N = II()
    Graph = [[] for _ in range(N)]
    for _ in range(N-1):
        A,B,C =MI()
        A-=1
        B-=1
        Graph[A].append((B,C))
        Graph[B].append((A,C))
    from collections import deque
    Ans = 0
    for bit in range(30):
        Q = deque()
        Seen = [False for i in range(N)]
        uf = UnionFind(N)
        for u in range(N):
            if (Seen[u] == True):  # 始点sが探索済みなら
                continue
            else:
                Q.append(u)
                # 始点をキューに入れる
                while Q:
                    s = Q.pop()
                    Seen[s] = True
                    # 0,→sで初めてたどり着いたときに行う処理はここで
                    for t,c in Graph[s]:
                        if Seen[t] == False and c & (1 << bit):
                            uf.union(s,t)
                            Q.append(t)
        Dec = [0]*N
        #print(uf.all_group_members())
        for n in range(N):
            Ans += (uf.size(n)-1-Dec[uf.find(n)]) * (2**bit)
            Dec[uf.find(n)] += 1
            Ans %= MOD
        #print(bit,Ans)
    print(Ans % MOD)
    return
solve()