Check the listing for details. 307 page PDF Text and 1,460 MP3 Special Forces SINHALA LANGUAGE Materials on CD. Condition: New. Listed at 14.99 USD. For the Special Operations Forces Language Office. Introduction Introduction 1. United States Special Operations Command. Lesson 1 People and Geography 30. Lesson 2 Living and Working 45. Lesson 11 Weather and Seasons 163.