N,S=map(int,input().split())
PI=[]
for i,p in enumerate(map(int,input().split())):
    PI.append((p,i))
PI.sort()
ans_lst=[]
for i in range(N):
    if i and S>=abs(PI[i][0]-PI[i-1][0]):
        continue
    if i<N-1 and S>=abs(PI[i][0]-PI[i+1][0]):
        continue
    ans_lst.append(PI[i][1])
ans_lst.sort()
print(len(ans_lst))
print(*[ans+1 for ans in ans_lst])