An RGB color is represented as a $7$ character string "#RRGGBB", consisting of a '#' symbol followed by three color components RR, GG, and BB, where each component consists of two hexadecimal digits.

A shorthand RGB color is a color where each of the three color components consists of two identical hexadecimal characters (such as "#11ee66").

The similarity between two colors color1 and color2 with components $(R_1, G_1, B_1)$ and $(R_2, G_2, B_2)$ evaluated in hexadecimal is calculated as:

$-(R_1 - R_2)^2 - (G_1 - G_2)^2 - (B_1 - B_2)^2$

Given a $7$ character string color, return a $7$ character string of a shorthand color that maximizes the similarity to color. If there are multiple answers, return any of them.

Constraints:

• color.length $= 7$

• color[$0$] = ext{'\\#'}

• color[$i$] is either a digit or a character in the range ['a', 'f'] for $i > 0$

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.