1Test begin 2Got semaphore 3Got semaphore 4Got semaphore 5Got semaphore 6Got semaphore 7Got semaphore 8Got semaphore 9Got semaphore 10Got semaphore 11Got semaphore 12Got semaphore 13Got semaphore 14Got semaphore 15Got semaphore 16Got semaphore 17Got semaphore 18Got semaphore 19Got semaphore 20Got semaphore 21Got semaphore 22Test end 23