N,M,K = map(int,input().split())
l = []
MOD = 10**9+7
NUM = 301
for _ in range(M):
  p,q,c = map(int,input().split())
  l.append((p,q,c))
dp = [[[0 for _ in range(K+1)] for _ in range(NUM)] for _ in range(N+1)]
for i in range(NUM):
  dp[0][i][0] = 1
for i in range(N):
  for k in range(K+1):
    for j in range(M):
      p,q,c = l[j]
      if k+c > K:
        break
      dp[i+1][q][k+c] += dp[i][p][k]
      dp[i+1][q][k+c] %= MOD

ans = 0
for i in range(NUM):
  ans += dp[N][i][K]
print(ans%MOD)