N,M,K = map(int, input().split())
L = [[int(l) for l in input().split()] for _ in range(M)]
mod = 10**9+7

num = 301
dp = [[[0]*(K+1) for _ in range(num)] for _ in range(2)]

for l in L:
    if l[2] > K:
        continue
    dp[1][l[1]][l[2]] += 1
for i in range(N-2):
    dp[i%2] = [[0]*(K+1) for _ in range(num)]
    for l in L:
        for k in range(K+1):
            if k+l[2] > K:
                continue
            dp[i%2][l[1]][k+l[2]] += dp[(i+1)%2][l[0]][k]
            dp[i%2][l[1]][k+l[2]] %= mod

ans = 0
for i in range(num):
    ans += dp[(N-1)%2][i][K]
    ans %= mod
print(ans)