N,M,K = map(int,input().split())

edge = []
for _ in range(M):
    p,q,c = map(int,input().split())
    edge.append((p,q,c))
mod = 10 ** 9 + 7
C = 301
dp = [[0] * (K + 1) for _ in range(C)]
for p,q,c in edge:
    if c <= K:
        dp[q][c] += 1
for _ in range(N - 2):
    nx = [[0] * (K + 1) for _ in range(C)]
    for p,q,c in edge:
        for i in range(K - c + 1):
            nx[q][i + c] += dp[p][i]
    for p in range(C):
        for i in range(K + 1):
            nx[p][i] %= mod
    dp = nx
ans = 0
for p in range(C):
    ans += dp[p][-1]
print(ans%mod)