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$List = (Invoke-WebRequest 'https://gist.githubusercontent.com/LabtechConsulting/8c7feb79dc94f656a43a725d7ec5f940/raw/7629014a459b9de01bd90ed2c27338e723144faa/new_gist_file_0').Content
$List = $List -split '[\r\n]' | where {$_}

function Bathroom-Code{
    param(
        [parameter(ValueFromPipeline=$True)]
        $Instruction        
    )
    begin{
        $x = 0
        $y = 0
        $Code = @()
    }
    process{
        $Instruction = $Instruction.ToCharArray() | where {$_ -match '\w'}
        foreach($Dir in $Instruction){
            switch($Dir) {
                'r'{ $x += 1}
                'l'{ $x -= 1}
                'u'{ $y += 1}
                'd'{ $y -= 1}
            }
            if($x -gt 1){$x=1}
            if($x -lt -1){$x=-1}
            if($y -gt 1){$y=1}
            if($y -lt -1){$y=-1}
            switch("$x$y"){
                '-11'{ $Key = 1}
                '01'{ $Key = 2}
                '11'{ $Key = 3}
                '-10'{ $Key = 4}
                '00'{ $Key = 5}
                '10'{ $Key = 6}
                '-1-1'{ $Key = 7}
                '0-1'{ $Key = 8}
                '1-1'{ $Key = 9}
            }
        }
        $Code += $Key
    } 
    end{$Code -join ''}    
}
$list | Bathroom-Code