basic (max level 2): .

H1

H2

H3

.

space: .

a b c

.

characters: .

a,b\cβÊ

.

emoji: .

🚀a

.

html entity: .

foo&bar

.

uniqueness: .

a

a

a

.

standard (permalink after): .

a

.

standard (permalink before): .

a

.