from collections import defaultdict
MOD = 998244353
n, m, t = map(int, input().split())
g = defaultdict(list)
for i in range(m):
    s, _t = map(int, input().split())
    g[s].append(_t)
    g[_t].append(s)

dp = [[0 for v in range(n)] for i in range(t+1)]
dp[0][0] = 1
for i in range(1, t+1):
    for v in range(n):
        for u in g[v]:
            dp[i][v] += dp[i-1][u] % MOD
        dp[i][v] %= MOD

print(dp[t][0])