N,M,X=list(map(int,input().split())) path=[] for i in range(10): path.append([0]*10) for i in range(M): u,v=list(map(int,input().split())) u-=1 v-=1 if u==v: path[u][v]+=1 else: path[u][v]+=1 path[v][u]+=1 MOD=998244353 dp=[] for i in range(X+1): dp.append([0]*((N+1)*N)) dp[0][N**2]=1 for i in range(X): for j in range((N+1)*N): if dp[i][j]==0: continue prev=j//N now=j%N if prev!=N: if path[prev][now]==0: continue B=sum(path[now])-1 if B==0: dp[i+1][N**2+now]=(dp[i+1][N**2+now]+dp[i][j])%MOD continue else: Binv=pow(B,MOD-2,MOD) for k in range(N): dp[i+1][now*N+k]=(dp[i+1][N**2+now]+dp[i][j]*Binv*(path[now][k]-1*(prev==k)))%MOD else: B=sum(path[now]) if B==0: dp[i+1][N**2+now]=(dp[i+1][N**2+now]+dp[i][j])%MOD continue else: Binv=pow(B,MOD-2,MOD) for k in range(N): dp[i+1][now*N+k]=(dp[i+1][N**2+now]+dp[i][j]*Binv*(path[now][k]))%MOD #print(dp) #print(path) for i in range(N): ans=0 for j in range(N+1): ans=(ans+dp[X][N*j+i])%MOD print(ans)