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E. Pillars

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputMarmot found a row with *n* pillars. The *i*-th pillar has the height of *h* _{ i} meters. Starting from one pillar *i* _{1}, Marmot wants to jump on the pillars *i* _{2}, ..., *i* _{ k}. (1 ≤ *i* _{1} < *i* _{2} < ... < *i* _{ k} ≤ *n*). From a pillar *i* Marmot can jump on a pillar *j* only if *i* < *j* and |*h* _{ i} - *h* _{ j}| ≥ *d*, where |*x*| is the absolute value of the number *x*.

Now Marmot is asking you find out a jump sequence with maximal length and print it.

Input

The first line contains two integers *n* and *d* (1 ≤ *n* ≤ 10^{5}, 0 ≤ *d* ≤ 10^{9}).

The second line contains *n* numbers *h* _{1}, *h* _{2}, ..., *h* _{ n} (1 ≤ *h* _{ i} ≤ 10^{15}).

Output

The first line should contain one integer *k*, the maximal length of a jump sequence.

The second line should contain *k* integers *i* _{1}, *i* _{2}, ..., *i* _{ k} (1 ≤ *i* _{1} < *i* _{2} < ... < *i* _{ k} ≤ *n*), representing the pillars' indices from the maximal length jump sequence.

If there is more than one maximal length jump sequence, print any.

Examples

Input

5 2

1 3 6 7 4

Output

4

1 2 3 5

Input

10 3

2 1 3 6 9 11 7 3 20 18

Output

6

1 4 6 7 8 9

Note

In the first example Marmot chooses the pillars 1, 2, 3, 5 with the heights 1, 3, 6, 4. Another jump sequence of length 4 is 1, 2, 4, 5.

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