N,M,T=map(int, input().split())
vec=[[0 for i in range(N)] for j in range(N)]
for i in range(M):
  vs,vt=map(int, input().split())
  vec[vs][vt]=1
  vec[vt][vs]=1
dp=[[0 for i in range(N)] for j in range(T+1)]
dp[0][0]=1
for i in range(T):
  for j in range(N):
    for k in range(N):
      if(vec[j][k]==1):
        dp[i+1][j]+=dp[i][k]
        dp[i+1][j]%=998244353
print(dp[T][0]%998244353)