Lobster-shrimp Chowder

• 5 lobster
• 60 ml dry sherry
• 28 gr butter
• 26 gr celery (chopped)
• 16 gr onion (finely chopped)
• 2 gr snipped parsley
• 1 package condensed cream of shrimp soup (undiluted)
• 1 package cream of mushroom soup (undiluted)
• 1 package soup milk