Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Mix all ingredients except ham in 5 qt slow cooker, then add ham., Cover and cook on low heat 8 to 10 hrs or on high heat 6 to 7 hours until peas are tender Remove ham from cooker; place on cutting board., Pull meat from bones, using 2 forks; discard bones and skin., Stir ham into soup., Stir well before serving.
water, peas, salt, pepper, carrots, stalks celery, onion, ham shanks