#define MD 998244353
ll n,k,a[2d5];
Mint s,d[11][1024];
{
	rd(n,k,a(n));
	d[0][0]=1;
	rep[a](h,n){
		rep(i,1024){
			if(!(i&h)){
				rrep(j,10){
					d[j+1][i|h]+=d[j][i];
				}
			}
		}
	}
	if(k<11){
		rep(i,1024){
			s+=d[k][i];
		}
	}
	wt(s);
}