Now the last para was not very polite .... but I guess Mentors have some kinda license to say like that. My skull is not yet thick man, and I don't have to forcefully open it (which is probably the case with you ...). You don't know how crazy you look ... when you say N=3 and x=3. > Getting through to you is like trying to stone a donkey to death with ripe figs. Precisely .. if you are not thorough with what you are talking aboout.