Grouping Symbols Based on Their Visual Resemblance

Arrange the shapes on the right so that similar symbols are nearer each other and dissimilar symbols are farther away from each other.
The final layout should accurately reflect your sense of the visual similarities and differences among the shapes.
Drag and drop the shapes to change their position.
Please perform the task as accurately and quickly as possible. When you are done, click the next button.
Consider the example below. Here, we have placed each color such that similar colors are near each other and dissimilar colors are farther apart. Your task is to construct a similar layout for shapes.

example:

DONE! Please tell us about any strategy you have used for determining visual similarities or differences of symbols, along with additional comments you might have. Thanks for helping!