N, S = map(int, input().split())
P = list(map(int, input().split()))
L = list(zip(P, list(range(N))))
L.sort()

OK = [False]*N
for i in range(N-1):
    if abs(L[i+1][0] - L[i][0]) <= S:
        OK[L[i+1][1]] = True
        OK[L[i][1]] = True
ans = []
for i in range(N):
    if OK[i] == False:
        ans.append(i+1)
print(len(ans))
print(*ans)