N,M,K=map(int,input().split())
P=[0]*301
Q=[0]*301
C=[0]*301
for i in range(M):
  p,q,c=map(int,input().split())
  P[i]=p-1
  Q[i]=q-1
  C[i]=c
  
mod=10**9+7
dp=[[[0]*(K+1) for _ in range(300)] for _ in range(N)]
for i in range(300):
  dp[0][i][0]=1

for i in range(N-1):
  for j in range(M):
    p=P[j]
    q=Q[j]
    c=C[j]
    for cost in range(K+1):
      if cost+c>K:continue
      dp[i+1][q][cost+c]+=dp[i][p][cost]
      dp[i+1][q][cost+c]%=mod
ans=0
for i in range(300):
  ans+=dp[N-1][i][K]
  ans%=mod
print(ans)