N, M, T = gets.split(" ").map{|s| s.to_i}

MOD = 998244353

v = Array.new(N) {Array.new(2, 0)}
r = Array.new(N) {Array.new}

M.times {
	s, t = gets.split(" ").map{|s| s.to_i}
	r[s] << t
	r[t] << s
}
v[0][0] = 1


0.upto(T-1) {|t|
	0.upto(N-1) {|i|
		v[i][(t+1)%2] = 0
		r[i].each {|j|
			v[i][(t+1)%2] = (v[i][(t+1)%2] + v[j][t % 2]) % MOD 
		}
	}
}

puts v[0][T%2]