import sys
input = sys.stdin.readline

N, M, K = map(int, input().split())
PQR = [tuple(map(int, input().split())) for _ in range(M)]
dp = [[[0]*(K+1) for _ in range(300)] for _ in range(N)]

for i in range(300):
    dp[0][i][0] = 1

MOD = 10**9+7

for i in range(N-1):
    for j in range(K+1):
        for P, Q, R in PQR:
            if j+R<=K:
                dp[i+1][Q-1][j+R] += dp[i][P-1][j]
                dp[i+1][Q-1][j+R] %= MOD

print(sum(dp[N-1][i][K] for i in range(300))%MOD)