n, s = map(int, input().split())
P = list(map(int, input().split()))
Q = sorted(P)
se = set()
for i in range(n):
    ok = True
    if i > 0 and Q[i] - Q[i - 1] <= s:
        ok = False
    if i < n - 1 and Q[i + 1] - Q[i] <= s:
        ok = False
    if ok:
        se.add(Q[i])

ans = [i for i, p in enumerate(P, 1) if p in se]
print(len(ans))
print(*ans)