import numpy as np

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

dp = np.zeros((300, K + 1), dtype=np.int64)
dp[:, 0] = 1

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