n, s = map(int, input().split())
p = sorted((x, i) for i, x in enumerate(map(int, input().split()), 1))
ans = []
for i in range(n):
    if i and p[i][0] - p[i-1][0] <= s or i + 1 < n and p[i+1][0] - p[i][0] <= s:
        pass
    else:
        ans.append(p[i][1])
ans.sort()
print(len(ans))
print(*ans)