heptomino

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Aspirin pills.

7 Drugs that Changed the World

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

heptomino

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Learn about this topic in these articles:

polyominoes

In number game: Polyominoes
…hexominoes and 108 types of heptominoes, if the dubious heptomino with an interior “hole” is included.
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