New-Aduser : The object name has bad syntax - powershell

Question

I have a script which i use to create bulk users from a csv file which works fine.
Import-Csv e:\temp\newemps.csv | %{
$ou = $_.ou
$firstname = $_.first
$lastName = $_.last
$accountName = $("{0}{1}" -f $firstname.Substring(0,1),$lastName).ToLower()
$description = $_.desc
$password = "Welcome1"
$name = "$firstName $lastName"
New-AdUser -SamAccountName $accountName -GivenName $firstName -UserPrincipalName "$accountName#ba.net" -Surname $lastName -DisplayName $name -Name $name -AccountPassword (ConvertTo-SecureString -AsPlainText $password -Force) -Enabled $true -Path $ou -Description $description -ChangePasswordAtLogon:$False
If ($_.Group -ne ""){
Add-adgroupmember -identity $_.group -members $accountName
}
If ($_.email -eq "y"){
Enable-Mailbox -Identity $accountName -Alias $accountName
Set-Mailbox $accountName -MaxSendSize 10mb -MaxReceiveSize 10mb
Get-CasMailbox $accountName -OwaEnabled:$false -ActiveSyncEnabled:$false
}
}
I was trying modify this script so that i could create some generic accounts that would not follow our typical convention. The input is a here-string as supposed to a csv as the only unique item is an Airport code. I have shortened the here-string for brevity.
$bases = #"
YAB
YEK
YYH
YHI
"#
$bases.Split("`n") | %{
$ou = "CN=Users,DC=BA,DC=NET"
$firstname = "$_".ToString()
$lastName = "Counter"
$accountName = "$_" + "Counter"
$description = "Base Front Counter"
$password = "Welcome1"
$name = "$firstName $lastName"
New-AdUser -SamAccountName $accountName -GivenName $firstName -UserPrincipalName "$accountName#ba.net" -Surname $lastName -DisplayName $name -Name $name -AccountPassword (ConvertTo-SecureString -AsPlainText $password -Force) -Enabled $true -Path $ou -Description $description -ChangePasswordAtLogon:$False
}
There is something about using a here-string that I am not accounting for. The only account it successfully creates is the one for YHI (The last one of the here-string). For all others it gives New-AdUser : The object name has bad syntax. Internet research shows many errors for csv-imports where the data has whitespace and other issues there but im not sure what the issue is here.
In the end I just made a csv file instead of using the here-string but I would like to know what i was doing wrong.

Answer 1

This worked for me. got rid of the null values and the new line values and just gave me each string value from each line. Seams there may have been some white space or some other characters that interfere if you just do split "`n"
$test = #"
user1
user2
user3
"#
$test.split(“`r`n”) | ForEach-Object {if($_){get-aduser $_}}