Three drunkards agree to pool their vodka and decided to share it with the fourth drunkard (who has no vodka) at a price equal to 5 roubles a litre. The first drunkard contributed 1 litre more than the second and the second contributed 1 litre more than the third. Then all four of them divided the vodka equally and drank it. The fourth drunkard paid money, which was divided in the ratio of each drunkard`s contribution towards his portion. It was found that the first drunkard should get twice as much money as the second. How much money did the second drunkard get (in roubles)?