mod=10**9+7
n,m,k=map(int,input().split())
code=[[] for _ in range(301)]
for _ in range(m):
    p,q,c=map(int,input().split())
    code[p].append((q,c))
dp=[[0]*(k+1) for _ in range(301)]
for i in range(1,301):
    dp[i][0]+=1

for i in range(1,n):
    newdp=[[0]*(k+1) for _ in range(301)]
    for s in range(1,301):
        for g, cx in code[s]:
            for ct in range(k+1):
                if ct+cx<=k:
                    newdp[g][ct+cx]+=dp[s][ct]
                    newdp[g][ct+cx]%=mod
    dp=newdp+[]

ans=0
for i in range(1,301):
    ans+=dp[i][k]
    ans%=mod
print(ans)