Expected Behavior

Write a function column$2$list$($grid$,$ n$),$ where grid is a list of lists and n is an integer, that returns a list consisting of the element at position n of each row of grid.

You can assume that $0<=$ n $<$ len$($r$)$ for each row $($i$.$e$.,$ element$)$ of grid.

Examples

In the examples below, x is assumed to be the following list of lists:

$[[\text{'}$aa$\text{'},\text{'}$bb$\text{'},\text{'}$cc$\text{'},\text{'}$dd$\text{'}],$

$[\text{'}$ee$\text{'},\text{'}$ff$\text{'},\text{'}$gg$\text{'},\text{'}$hh$\text{'},\text{'}$ii$\text{'},\text{'}$jj$\text{'}],$

$[\text{'}$kk$\text{'},\text{'}$ll$\text{'},\text{'}$mm$\text{'},\text{'}$nn$\text{'}]]$

column$2$list$($x$,3)$

return value: $[\text{'}$dd$\text{'},\text{'}$hh$\text{'},\text{'}$nn$\text{'}]$

column$2$list$($x$,0)$

return value: $[\text{'}$aa$\text{'},\text{'}$ee$\text{'},\text{'}$kk$\text{'}]$