A 52-year-old patient complains of pain in the right part of her chest, dyspnea, cough with large amounts of foamy sputum emitting foul smell and resembling "meat slops". Objectively: the patient’s condition is grave, cyanosis is observed, breathing rate is 31/min. percussion sound above the right lung is shortened, auscultation revealed various moist rales (crackles). What is the most likely diagnosis?