Write a statement that outputs variable num$\_$keys as follows. End with a newline.

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

Keys: $3$

$1\text{'}"$ Our tests will run your program with input $3,$ then run again with input $6.2$ Your program should work for any input, though. $\text{'}.\text{'}$

$3$ num$\_$keys $=$ input$()$

$4$

$5$ I$\text{'}$l$\text{'}$ Your code goes here

$6$