def mul(A, B) :
    N=len(A)
    mod=998244353
    C=[[0 for i in range(N)] for j in range(N)]
    for i in range (N) : 
        for j in range(N) : 
            for k in range(N) :
                C[i][j]+=A[i][k]*B[k][j]%mod
            C[i][j]%=mod
    return C

def powmat(A, n) :
    N=len(A)
    C=[[0 for i in range(N)] for j in range(N)]
    for i in range(N) : C[i][i] = 1
    while n > 0 :
        if n%2==1 : C = mul(C,A)
        A=mul(A,A)
        n>>=1
    return C

def solve() : 
    N, K = map(int,input().split())
    mod = 998244353
    M = K**3
    A = [[0 for i in range(M)] for j in range(M)]
    for i in range(K) :
        for j in range(K) :
            for k in range(K) :
                cur=i*K*K+j*K+k;
                nxt1=i*K*K+j*K+(k+1)%K;
                nxt2=i*K*K+(j+k)%K*K+k;
                nxt3=(i+j)%K*K*K+j*K+k;
                A[nxt1][cur]+=1
                A[nxt2][cur]+=1
                A[nxt3][cur]+=1
    C = powmat(A, N)
    ans = 0
    for i in range(K*K) : 
        ans += C[0][i]
    print(ans%mod)

solve()