list(N = 16, J = 16,
Y = c(4, 3, 0, 2, 3, 2, 0, 0, 2, 1, 2, 3, 17, 3, 2, 13),
A = c(900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900, 900), 
x = c(15, 45, 75, 105, 15, 45, 75, 105, 15, 45, 75, 105, 15, 45, 75, 105),
y = c(15, 15, 15, 15, 45, 45, 45, 45, 75, 75, 75, 75, 105, 105, 105, 105)
)