N,K,X,Y,i,j,k,M=1024;long d[48][1024],r,a[1024],*p=d;main(){scanf("%d%d%d%d",&N,&i,&X,&Y);while(~scanf("%d",&i))a[i]=*p=1;for(i=k=M;i--;)K+=a[i];for(;++i<N;p+=k)for(j=k;k=M,j--;p[M+M+j]-=p[j]*(K-!!i))for(;k;p[M+j^--k]+=p[j]*a[k]);for(;X-k--;r+=k<=Y?p[k]:0);printf("%d\n", r % 998244353);}