A letter can be to leaders.Logical formLearned from597 sentences. Response can be to a letter.Logical formLearned from589 sentences. Men can be constituted-of-or-filled-with letters.Logical formLearned from585 sentences. A letter may arrive.Logical formLearned from576 sentences. A letter may be published.Logical formLearned from573 sentences. A letter may be released.Logical formLearned from572 sentences. Letters may pertain-to a name.Logical formLearned from569 sentences. A letter can be confidential.Logical formLearned from569 sentences. Letters may pertain-to a last name.Logical formLearned from568 sentences. Copies can be constituted-of-or-filled-with letters.Logical formLearned from568 sentences. Copies may pertain-to a letter.Logical formLearned from562 sentences. A letter may pertain-to a country.Logical formLearned from562 sentences. A letter may be written/wrote.Logical formLearned from562 sentences. A letter may pertain-to a government-agency.Logical formLearned from561 sentences. A male may send a letter.Logical formLearned from561 sentences.