sls '^........k.$' .\wordlist.txt -raw |where { $W=$_; ('a','b','c' |where { $W.Contains($_) -and $W.IndexOf($_) -eq $W.LastIndexOf($_) }

sls '^........k.$' .\wordlist.txt -raw |where { $W=$_; ('a','b','c' |where { $W.Contains($_) -and $W.IndexOf($_) -eq $W.LastIndexOf($_) } ).Count -eq 3 }