n,m,T=map(int,input().split())
mod=998244353
g=[[] for _ in range(n)]
for _ in range(m):
    s,t=map(int,input().split())
    g[s].append(t)
    g[t].append(s)
dp=[[0]*n for _ in range(T+1)]
dp[0][0]=1
for i in range(1,T+1):
    for j in range(n):
        for to in g[j]:
            dp[i][j]+=dp[i-1][to]
            dp[i][j]%=mod
print(dp[T][0])