/*
s([a(X)],P).
Variables: [(1,[]),(5,[]),(2,[]),(6,[])]
P = 0.2775
X = 1 ? ;
Variables: [(3,[]),(5,[]),(4,[]),(6,[])]
P = 0.36
X = 2 ? ;
*/

a(1):0.3:-p(1).

a(1):0.3:-p(2).

a(2):0.4:-p(1).

a(2):0.4:-p(2).

p(1):0.5.

p(2):0.5.