import sys
input=lambda: sys.stdin.readline().rstrip()
n,m,k=map(int,input().split())
mod=10**9+7
PQ=[[int(i) for i in input().split()] for _ in range(m)]

DP=[[[0]*(k+1) for i in range(301)] for j in range(n+1)]

for p,q,c in PQ:
  if c<=k:
    DP[2][q][c]+=1
for i in range(2,n):
  for p,q,c in PQ:
    for j in range(k+1-c):
      DP[i+1][q][j+c]+=DP[i][p][j]
      if DP[i+1][q][j+c]>mod:
        DP[i+1][q][j+c]=DP[i+1][q][j+c]%mod
ans=0
for i in range(301):
  ans=(ans+DP[n][i][k])%mod
print(ans)