Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Here, there were four one-by-one squares, two rows, two columns and one larger two-by-two square.
Source: https://fivethirtyeight.com/features/can-you-pack-the-ellipses/