Python: Set animals$\_$remaining is initialized with three animals read from input. Remove 'cow' from animals$\_$remaining. Then, assign num$\_$animals with the number of elements in animals$\_$remaining.

Ex: If the input is:

bird

cow

lizard

then the output is:

$[\text{'}$bird$\text{'},$ 'lizard'$]$

Number of values remaining: $2$

Note: Because sets are unordered, the set is printed using the sorted$()$ function here for comparison.

animals$\_$remaining $=$ set$()$

new$\_$animal$1=$ input$()$

new$\_$animal$2=$ input$()$

new$\_$animal$3=$ input$()$

animals$\_$remaining.add$($new$\_$animal$1)$

animals$\_$remaining.add$($new$\_$animal$2)$

animals$\_$remaining.add$($new$\_$animal$3)$