#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <atcoder/modint>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)


const i64 INF = 1001001001001001001;
using modint = atcoder::static_modint<998244353>;


int main(){
    int N, K; cin >> N >> K;
    vector<modint> dp(N+1);
    vector<modint> invMod(N+1);
    for(int i=1; i<=N; i++) invMod[i] = modint(i).inv();
    dp[N] = 1;
    modint ans = 0;
    rep(k,K){
        for(int i=1; i<=N; i++){
            dp[i-1] = dp[i] * invMod[i];
        }
        dp[N] = 0;
        for(int i=N; i>=1; i--) dp[i-1] += dp[i];
        ans += dp[0];
    }
    cout << ans.val() << '\n';
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;