#include <bits/stdc++.h>
using namespace std;

#define CPP_STR(x) CPP_STR_I(x)
#define CPP_CAT(x, y) CPP_CAT_I(x, y)
#define CPP_STR_I(args...) #args
#define CPP_CAT_I(x, y) x##y

#define ASSERT(expr...) assert((expr))

using i8 = int8_t;
using u8 = uint8_t;
using i16 = int16_t;
using u16 = uint16_t;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;

using f32 = float;
using f64 = double;
// }}}

constexpr i64 INF = 1'010'000'000'000'000'017LL;

constexpr i64 MOD = 998244353LL;

constexpr f64 EPS = 1e-12;

constexpr f64 PI = 3.14159265358979323846;

#define M5 100007
#define M9 1000000000

#define F first
#define S second

// util {{{
#define FOR(i, start, end) for (i64 i = (start), CPP_CAT(i, xxxx_end) = (end); i < CPP_CAT(i, xxxx_end); ++i)
#define REP(i, n) FOR(i, 0, n)

#define all(x) (x).begin(), (x).end()
#define ll long long int
#define VI vector<ll>
#define VVI vector<VI>

#define ISD true
#define debug(x) \
    if (ISD)     \
    cout << #x << ": " << x << endl

template <typename T, typename U, typename Comp = less<>>
bool chmax(T &xmax, const U &x, Comp comp = {})
{
    if (comp(xmax, x))
    {
        xmax = x;
        return true;
    }
    return false;
}

template <typename T, typename U, typename Comp = less<>>
bool chmin(T &xmin, const U &x, Comp comp = {})
{
    if (comp(x, xmin))
    {
        xmin = x;
        return true;
    }
    return false;
}

int main()
{
    int N, S;
    cin >> N >> S;
    vector<ll> P(N);
    REP(i, N)
    cin >> P[i];

    vector<pair<ll, ll>> V(N);
    REP(i, N)
    {
        V[i].F = P[i];
        V[i].S = i;
    }
    sort(all(V));
    vector<int> ans;
    REP(i, N)
    {
        bool isOK = true;
        if (i > 0 && V[i].F - V[i - 1].F <= S)
        {
            isOK = false;
        }
        if (i < N - 1 && V[i + 1].F - V[i].F <= S)
        {
            isOK = false;
        }
        if (isOK)
        {
            ans.push_back(V[i].S);
        }
    }
    sort(all(ans));
    cout << ans.size() << endl;
    for (auto a : ans)
    {
        cout << a + 1 << " ";
    }
    cout << endl;
}