n,m,k = map(int,input().split())
PQC = [list(map(int,input().split())) for i in range(m)]
mod = 10**9+7
s = 300
dp = [[0]*(k+1) for i in range(s)]
for i in range(s):
    dp[i][0] = 1

for i in range(n-1):
    ndp = [[0]*(k+1) for i in range(s)]
    for p,q,c in PQC:
        p,q = p-1,q-1
        for j in range(k+1):
            if dp[p][j] == 0:
                continue
            if j+c <= k:
                ndp[q][j+c] += dp[p][j]
                ndp[q][j+c] %= mod
    dp = ndp

ans = 0
for i in range(s):
    ans += dp[i][k]
    ans %= mod
print(ans)