Put the following basic operations of the milking process in the correct order.

• 1.Letting in the cows
• 2.Put the cows in the waiting area
• 3.Preparing milking installation
• 4.Cleaning teats
• 5.Milk is cooled and stored
• 6.Pre-treatment
• 7.Teat dipping
• 8.Attaching the milking claw
• 9.Removing milking claw
• 10.Cleaning milking installation and pit