Powershell Text Replacement Script

function Replace-Number($input_file, $output_file) {
    $start = Read-Host "Enter starting number: "
    $line_number = [int]$start

    Get-Content $input_file | ForEach-Object {
        $new_line = $_.Substring(0, 19) + $line_number.ToString("D4") + $_.Substring(23)
        $new_line | Out-File $output_file -Append
        $line_number++
    }
}

# Example usage
Replace-Number 'input.txt' 'output.txt'