Python: When the input variable number$\_$of$\_$fish is:

less than or equal to $6,$ output 'Small aquarium'.

between $6$ exclusive and $16$ exclusive, output 'Medium aquarium'.

greater than or equal to $16,$ output 'Multiple aquariums needed'.

Ex $1$: If the input is $5,$ then the output is:

Small aquarium

Ex $2$: If the input is $15,$ then the output is:

Medium aquarium

Ex $3$: If the input is $17,$ then the output is:

Multiple aquariums needed