"""

グラフ
メモ化再帰
各頂点で開始、複雑さXのものはいくつあるかをメモ化再帰で求める
N * 300 なので行ける

"""
import sys

mod = 10**9+7

def dfs(v,k,n):

    if k == 0 and n == 0:
        return 1
    elif k < 0 or n <= 0:
        return 0
    elif visit[v][k][n] != None:
        return visit[v][k][n]

    ret = 0
    for nex,cost in lis[v]:
        ret += dfs(nex , k-cost , n-1)
        ret %= mod

    visit[v][k][n] = ret
    return ret

N,M,K = map(int,input().split())

lis = [ [] for i in range(N) ]
visit = [[[None] * N for j in range(K+1)] for i in range(N)]


for i in range(M):

    P,Q,C = map(int,input().split())
    P -= 1
    Q -= 1
    lis[P].append((Q,C))

ans = 0
for i in range(N):
    ans += dfs(i,K,N-1)
    ans %= mod
print (ans)
#print (visit)