S1: We do not know, after 60 years of education, how to protect ourselves against epidemics like cholera and plague. P: If our doctors could have started learning medicine at an earlier age, they would not make such a poor show as they do. Q: I have seen hundreds of homes. I cannot say that I have found any evidence in them of knowledge of hygiene. R: I consider it a very serious blot on the state of our education that our doctors have not found it possible to eradicate these diseases. S: I have the greatest doubt whether our graduates know what one should do in case one is bitten by a snake. S6: This is the disastrous result of the system under which we are educated. Find the correct sequence of P, Q, R and S.