#include <bits/stdc++.h>
using namespace std;
const int mod = 998244353;
int read() {
    int res = 0, f = 1;
    char ch = getchar();
    while (ch < '0' || ch > '9') {
        f = -1;
        ch = getchar();
    }
    while (ch >= '0' && ch <= '9') {
        res = (res << 1) + (res << 3) + (ch ^ 48);
        ch = getchar();
    }
    return res * f;
}
int n, k, ans;
namespace subtask2 {
bool check(int x) {
    int temp = 0;
    while (x) {
        if (x & 1)
            temp++;
        x >>= 1;
    }
    return temp == k;
}
void main() {
    for (int i = 1; i < (1 << (1 << n)); ++i) {
        int temp = (1 << (1 << n)) - 1, ti = i, o = 0;
        while (ti) {
            //				cout<<temp<<' ';
            if (ti & 1)
                temp &= o;
            ti >>= 1;
            ++o;
        }
        //			cout<<temp<<endl;
        if (check(temp))
            ans = (ans + 1) % mod;
    }
    cout << ans << endl;
}
}  // namespace subtask2
int main() {
    n = read();
    k = read();
    if (n <= 4) {
        subtask2::main();
    }
    return 0;
}