MOD=10**9+7

N,M,K=map(int,input().split())
P=[0]*M
Q=[0]*M
C=[0]*M

for i in range(M):
    P[i],Q[i],C[i]=map(int,input().split())

dp0=[[0]*(K+1) for i in range(N)]
dp1=[[0]*(K+1) for i in range(N)]

for i in range(N):
    dp0[i][0]=1

for t in range(N-1):
    for i in range(M):
        for num in range(K+1):
            nnum=num+C[i]
            if nnum>K:
                continue
            if t%2==0:
                dp1[Q[i]][nnum]+=dp0[P[i]][num]
                dp1[Q[i]][nnum]%=MOD
            else:
                dp0[Q[i]][nnum]+=dp1[P[i]][num]
                dp0[Q[i]][nnum]%=MOD

    if t%2==0:
        dp0 = [[0] * (K + 1) for i in range(N)]
    else:
        dp1 = [[0] * (K + 1) for i in range(N)]

ans=0
for i in range(N):
    ans+=dp0[i][K]+dp1[i][K]
ans%=MOD
print(ans)