import numpy as np

N, M, K = map(int, input().split())
G = [[] for _ in range(N)]
PQC = [tuple(map(int, input().split())) for _ in range(M)]
MOD = 10 ** 9 + 7

dp = np.zeros((300, K + 1), dtype=int)
dp[:, 0] = 1

for i in range(N-1):
    new_dp = np.zeros_like(dp)
    for p, q, c in PQC:
        new_dp[q - 1, c:] += dp[p - 1, :K + 1 - c]
    dp = new_dp % MOD
print(dp[:, -1].sum() % MOD)