Making a random SID generator

Question

So im definitely close to exactly what im looking for on this. Basically, I have users, and for security purposes, I want their usernames to be randomly generated 7 character SIDs.

example: rgf8uwt or euw2prt or wif5llc

basically it would be 3 letters, then 1 number then 3 more letters

So im trying to create a random generator to do this and what I have so far is:

#to create the random number
-join ((48..57) | get-random -Count 1 | % {[char]$_})

#to create the random 3 letter string
-join ((97..122) | Get-Random -Count 3 | % {[char]$_})

So now where im stuck is merging the 2 together is a way that it generates a string of characters that is 7 long, with 3 letters, then 1 number, and then 3 letters.

Unless theres a better way to do this that i just dont know about.

Answer 1

With a + it seems to work

$Part1 = -join ((97..122) | Get-Random -Count 3 | % {[char]$_})
$Part2 = -join ((48..57) | get-random -Count 1 | % {[char]$_})
$Part3 = -join ((97..122) | Get-Random -Count 3 | % {[char]$_})

$Part1 + $Part2 + $Part3