N,S = map(int,input().split())
P = list(map(int,input().split()))
l = [(P[i],i + 1) for i in range(N)]
l.sort()
ans = []
for i in range(N):
	p,j = l[i]
	flag = True
	if i > 0:
		pp,jj = l[i-1]
		if p - pp <= S:
			falg = False
	if i < N - 1:
		pp,jj = l[i + 1]
		if pp - p <= S:
			flag =  False
	if flag:
		ans.append(j)
ans.sort()
print(len(ans))
print(*ans)