Jenny, Samantha and Shiji hosted their birthday parties on 10th,

11th and 12th May, not necessarily in the same order. The total

number of guests, who attended their parties, were three

consecutive even numbers. 150 guests attended the party on

11th May. Maximum possible number of guests attended

Samantha's party while least possible number of guests attended

Jenny's party, which was not on 12t May. 50 guests were

common in all the three parties.