n,m,t=map(int,input().split())
s=[set() for i in range(n)]
for i in range(m):
    x,y=map(int,input().split())
    s[x].add(y)
    s[y].add(x)
    
dp=[[0]*n for i in range(t+1)]
dp[0][0]=1
mod=998244353 

for i in range(1,t+1):
    for j in range(n):
        for k in s[j]:
            dp[i][j] += dp[i-1][k]
            dp[i][j] %= mod
            
print(dp[-1][0]%mod)