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

xs = [(p, i) for i, p in enumerate(P)]
xs.sort()

res = set()
if len(xs) == 1:
    res.add(xs[0][1])
elif len(xs) > 1:
    a = xs[0][0]
    b = xs[1][0]
    if a+S < b:
        res.add(xs[0][1])

    a = xs[-2][0]
    b = xs[-1][0]
    if a+S < b:
        res.add(xs[-1][1])

if len(xs) > 2:
    for i in range(1, N-1):
        a = xs[i-1][0]
        b = xs[i][0]
        c = xs[i+1][0]
        if a+S < b and b+S < c:
            res.add(xs[i][1])

ans = sorted(res)
print(len(ans))
print(*[x+1 for x in ans])