procedure main(args)
nr := integer(args[1]) | 3 # Default to 3x3
nc := integer(args[2]) | 3
A := list(nr)
every !A := list(nc)
x := ?nr # Select a random element
y := ?nc
A[x][y] := &pi
write("A[",x,"][",y,"] -> ",A[x][y])
end