S₁ : One fine morning, I heard a sound of fire engines with loud alarm bells.
S₆ : It was a terrible scene, as huge flames of fire were coming put of the house.
P : I thought, perhaps a house was on fire.
Q : They were regulating the crowd.
R : The policemen were standing around a big house.
S : I immediately rushed out to see what was happening.
The correct sequence should be