All M is in S.
Some S is in P.
The initial letter in a Minor Mood indicates that Mood of the First to which it may be reduced. Thus Festino is reduced to Ferio, and Dimaris to Darii. In the cases of Baroko and Bokardo, B indicates that you may employ Barbara to bring any impugner to confusion, as shall be afterwards explained.
The letters s, m, and p are also significant. Placed after a vowel, s indicates that the proposition has to be simply converted. Thus, FEstInO:—
No P is in M.
Some S is in M.
Some S is not in P.
Simply convert the Major Premiss, and you get FErIO, of the First.
No M is in P.