A 38-year-old man complains of cough with purulent sputum (up to 60-80 mL per day) and a fever of 39°C. He associates his condition with overexposure to cold. Objectively, his pulse is 96/min., rhythmic. Blood pressure-110/60 mm Hg. Examination revealed that the right side was lagging behind in the process of breathing. Respiratory rate- 30/min. Percussion detects local dullness of the sound near the angle of the scapula. Auscultation detects heterogeneous wet crackles and amphoric breathing. What is the most likely diagnosis in this case?