import sys
input = sys.stdin.readline
def iinput(): return int(input())
def sinput(): return input().rstrip()
def i0input(): return int(input()) - 1
def linput(): return list(input().split())
def liinput(): return list(map(int, input().split()))
def miinput(): return map(int, input().split())
def li0input(): return list(map(lambda x: int(x) - 1, input().split()))
def mi0input(): return map(lambda x: int(x) - 1, input().split())
INF = 10**20
MOD = 998244353

N, M, T = liinput()
g = [[] for _ in range(N)]

for _ in [0] * M:
    s, t = liinput()
    g[s].append(t)
    g[t].append(s)

ans = [[0 for _ in range(N)] for _ in range(T + 1)]
ans[0][0] = 1

for i in range(T):
    for j in range(N):
        for k in g[j]:
            ans[i + 1][j] += ans[i][k]
            ans[i + 1][j] %= MOD
print(ans[T][0])