December scripting games puzzle - http://powershell.org/wp/2015/12/05/december-2015-scripting-games-puzzle/

Get-TwelveDaysOfChristmas.ps1

$list = @"
1 Partridge in a pear tree
2 Turtle Doves
3 French Hens
4 Calling Birds
5 Golden Rings
6 Geese a laying
7 Swans a swimming
8 Maids a milking
9 Ladies dancing
10 Lords a leaping
11 Pipers piping
12 Drummers drumming
"@

$birdCollection = @("Birds","Doves", "Geese", "Hens", "Partridge","Swans")

$verseCollection = $list -split "`n" | ForEach-Object -Process { 
                        $dayOfXmas = New-Object -TypeName psobject
                        if($_ -match "(\d+\s+)([\s\S]+)"){
                            $dayOfXmas | 
                            Add-Member -MemberType NoteProperty -Name Day -Value $Matches[1] -PassThru | 
                            Add-Member -MemberType NoteProperty -Name Lyric -Value $Matches[2] -PassThru
                        }
                    }

$verseCollection | Select-Object -Property Day, Lyric, @{l='Length';e={$_.Lyric.Length}}| 
                    Sort-Object -Property Length | Select-Object -Property Lyric



$countBirdsRef = 0
$verseCollection | ForEach-Object {$_.Lyric -split "\s+"} |
                    ForEach-Object -Process {
                        if($birdCollection -contains $_){$countBirdsRef++}
                    }

$cumulativeGiftCount = 0
$intrnlIterator = 0
$verseCollection.Day | ForEach-Object -Process {
    $intrnlIterator += ($_ -split "\s" | Measure-Object -Sum).Sum
    $cumulativeGiftCount += $intrnlIterator
}

"*"*50
"Bird References = {0}" -f $countBirdsRef

"Total count = {0}" -f ($verseCollection | Measure-Object -Property Day -Sum).Sum

"Cumulative Gift Count = {0}" -f $cumulativeGiftCount