Lab -Changing Document Shape with $project

I have come up with below query to Pass the Lab
var pipeline =[{$project:{oneWord :{$split:["$title", " “]}, arrSize: {$size:{$split:[”$title", " “]}}, title:1}}, {$unwind:”$arrSize"}, {$match:{arrSize:{$eq:1}}}]

I am not sure is this good way to write the query Or we have other optimized pipeline to achieve the same

db.movies.aggregate([{$project:{count:{$size:{$split:["$title"," “]}},title:1}},{$unwind:”$count"},{$match:{count:{$eq:1}}}])