N, M, T = gets.split.map(&:to_i)
MOD = 998244353
edges = []
M.times do
    s, t = gets.split.map(&:to_i)
    edges << [s, t]
end

dp = Array.new(N, 0)
dp[0] = 1

T.times do
    dp2 = Array.new(N, 0)
    edges.each do |s, t|
        dp2[s] += dp[t]
        dp2[t] += dp[s]
    end
    N.times do |i|
        dp2[i] %= MOD
    end
    dp = dp2
end

puts dp[0] % MOD