N,M,K = map(int,input().split())
l = []
MOD = 10**9+7
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(301)] for _ in range(N+1)]

for i in range(N):
  for j in range(M):
    p,q,c = l[j]
    for k in range(K+1-c):
      dp[i+1][q][k+c] = dp[i][p][k]+1
      dp[i+1][q][k+c] %= MOD

ans = 0
for i in range(301):
  ans += dp[N][i][K]//2
print(ans)