Meet the Dots

Dots are one of the three suits in Mahjong Island, numbered 1 to 9.

Each of these has four copies in a game, so you'll see the same tile more than once.

Three in a row make a Run, like 1, 2, 3, or 7, 8, 9.

Bamboo and Characters work exactly the same way, numbered 1 to 9.