Nil 
On Monday morning, a snail fell down a well which is $$5$$ metres deep. During the day, it climbs up $$2$$ metres, and during the night it slides down $$1$$ metre. On what day of the week will the snail get out of the well? 
[A] $$$$Tuesday 
[B] $$$$Wednesday 
[C] $$$$Thursday 
[D] $$$$Friday 
[E] $$$$Monday 