$b = [System.IO.File]::ReadAllText('fix-prod.b64').Trim()
$n = $b.Length
$half = [int]($n / 2)
$s1 = $b.Substring(0, $half)
$s2 = $b.Substring($half)
[System.IO.File]::WriteAllText('fix-prod.s1', $s1)
[System.IO.File]::WriteAllText('fix-prod.s2', $s2)
Write-Host "Total=$n seg1=$($s1.Length) seg2=$($s2.Length)"