import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
inf = 18446744073709551615
# inf = 4294967295
# md = 10**9+7
md = 998244353

n, m, t = LI()
to = [[] for _ in range(n)]

for _ in range(m):
    u, v = LI()
    to[u].append(v)
    to[v].append(u)

dp = [0]*n
dp[0] = 1
for _ in range(t):
    ndp = [0]*n
    for u in range(n):
        s = 0
        for v in to[u]:
            s = (s+dp[v])%md
        ndp[u] = s
    dp = ndp

print(dp[0])