Order the sentence:

S1: Hungary, with a population of about 10 million, lies between Czechoslovakia to the North and Yugoslavia to the South.

P: Here a great deal of grain is grown

Q: In recent years, however, progress has been made also in the field of industrialisation 

R: Most of this country consists of an extremely fertile plain, through which the river Danube flows 

S: In addition to grain, the plain produces potatoes, sugar, wine and livestock.

S6: The new industries derive mainly from agricultural production.

The proper sequence should be