LONDON - Sherlock Holmes and Dr. Watson returned to the house on 221-B Baker Street, after a sleepless night spent in ambush while investigating a case. Surprisingly, Inspector Lestrade and Wang Tao were waiting for them to play mahjong.
"We are here because we have agreed to play on Sunday at 10 a.m.," said Mr. Lestrade.
"Wow, it's already Sunday," answered Dr. Watson with very sleepy eyes.
So the game started, the dice were thrown, the wall was broken, and the tiles were dealt. Before East prepared to shed his first discard, however, something totally unexpected happened. Dr. Watson fell asleep.
"What should we do Now? Mrs. Hudson is out. Can we play with just three?" asked Mr. Lestrade, looking at snoring Dr. Watson.
"I propose we play as much as we can, and then we'll decide," said Mr. Holmes.
So the game continued. Players played their tiles, making declarations, when after "Hu", Dr. Watson woke up.
"Gentlemen, I had very interesting dreams. The last one resembled this "Hu" declaration. Well, I see the deal has now finished."
Question (): Provided Dr. Watson did not play while sleeping, and the deal continued for as long as it was possible without disturbing Dr. Watson, please tell how many dreams Dr. Watson saw during his sleep, where each dream corresponds to exactly one successful declaration: "Flower", "Chow", "Pung", "Kong", "Hu". For clarity, there were no false "Hu" declarations.