[ Blue gray ]

[ Light gray ]

[ Dark gray ]

[ Milk white ]

[ 2 pairs [light gray + dark gray] ]

[ 2 pairs [milk white + dark gray] ]

[ 2 pairs [light gray + milk white] ]

[ 3 pairs [light gray + light gray + dark gray] ]

[ 3 pairs [light gray + blue gray + milk white] ]

[ 3 pairs [light gray + blue gray + dark gray] ]

[ 3 pairs [blue gray + cream white + dark gray] ]

[ 3 pairs [light gray + light gray + milk white] ]

[ 3 pairs [milk white + milk white + light gray] ]

[ 2 pairs [light gray + blue gray] ]

[ 2 pairs [blue gray + milk white] ]

[ 2 pairs [blue grey + dark grey] ]