A book can be constituted-of-or-filled-with letters.Logical formLearned from106 sentences. Letters may be used.Logical formLearned from106 sentences. A person may write in a letter.Logical formLearned from106 sentences. Letters may pertain-to names.Logical formLearned from106 sentences. A letter may confirm that something-is-the-case.Logical formLearned from106 sentences. Letters may be published.Logical formLearned from106 sentences. A letter may claim that something-is-the-case.Logical formLearned from106 sentences. A letter can be to a country.Logical formLearned from106 sentences. Persons may send a person a letter.Logical formLearned from105 sentences. A letter may allege that something-is-the-case.Logical formLearned from104 sentences. A letter may be addrest to a male.Logical formLearned from104 sentences. A letter can be in a month.Logical formLearned from104 sentences. Letters can be constituted-of-or-filled-with encouragement.Logical formLearned from104 sentences. A male may leave a letter.Logical formLearned from104 sentences. A letter can be presidential.Logical formLearned from104 sentences.