N, S = map(int,input().split())
P = list(map(int, input().split()))

if N == 1:
	print(1)
	print(1)
	exit()


sp = [(P[i], i) for i in range(N)]
sp.sort()

ans = []
if sp[1][0] - sp[0][0] > S:
	ans.append(sp[0][1] + 1)
for i in range(1, N - 1):
	if sp[i + 1][0] - sp[i][0] > S and sp[i][0] - sp[i - 1][0] > S:
		ans.append(sp[i][1] + 1)

if sp[-1][0] - sp[-2][0] > S:
	ans.append(sp[-1][1] + 1)

print(len(ans))
print(*ans)