A letter can be to customers.Logical formLearned from29 sentences. A customer can be satisfied.Logical formLearned from29 sentences. Customers may arrive.Logical formLearned from29 sentences. Customers may use a system.Logical formLearned from29 sentences. Changes can be in (customer requirements).Logical formLearned from29 sentences. Purchases can be by customers.Logical formLearned from29 sentences. One-third may pertain-to customers.Logical formLearned from29 sentences. Complaints can be by customers.Logical formLearned from29 sentences. A feedback can be from customers.Logical formLearned from29 sentences. A language may pertain-to customers.Logical formLearned from29 sentences. A point may pertain-to customers.Logical formLearned from29 sentences. Customers may come to a person.Logical formLearned from29 sentences. A customer can be firm.Logical formLearned from29 sentences. References can be from customers.Logical formLearned from29 sentences. A person may care about customers.Logical formLearned from29 sentences.