## Note: Probabilities are different from those in
## the problem statement
C sandys = 0.1
C movies = 0.9
P withchris = 0.4
P swim      = 0.6
K sandys withchris : 0 = 0.7
K sandys withchris : 1 = 0.3
K sandys swim      : 0 = 0.4
K sandys swim      : 1 = 0.6
K movies withchris : 0 = 0.4
K movies withchris : 1 = 0.6
K movies swim      : 0 = 0.4
K movies swim      : 1 = 0.6
D 0 : home = 0.8
D 0 : sandys = 0.2
D 1 : home = 0.5
D 1 : sandys = 0.5