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

P = [(i + 1, int(v)) for i, v in enumerate(input().split())]

P.sort(key=lambda x: x[1])
P.insert(0, (0, -S-1))
P.append((N + 1, P[-1][1] + S + 1))

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

ans.sort()
print(len(ans))
print(' '.join(map(str, ans)))