Letters can be diplomatic.Logical formLearned from60 sentences. A letter can be effective.Logical formLearned from60 sentences. An information may be contained in a letter.Logical formLearned from60 sentences. Drafts can be constituted-of-or-filled-with letters.Logical formLearned from60 sentences. A letter can be to a city.Logical formLearned from60 sentences. Letters may pertain-to a mother.Logical formLearned from60 sentences. A letter can be classified.Logical formLearned from60 sentences. A letter can be to persons.Logical formLearned from60 sentences. A series can be constituted-of-or-filled-with some letters.Logical formLearned from59 sentences. Letters can be periodic.Logical formLearned from59 sentences. A correspondence may include letters.Logical formLearned from59 sentences. Letters may be addrest.Logical formLearned from59 sentences. Letters can be regulatory.Logical formLearned from59 sentences. Piles can be constituted-of-or-filled-with letters.Logical formLearned from59 sentences. Some fictional characters may begin with a letter.Logical formLearned from59 sentences.