1wyckoffs: 2- "b" 3- "b" 4- "b" 5- "b" 6- "j" 7- "j" 8- "j" 9- "j" 10- "j" 11- "j" 12- "j" 13- "j" 14- "j" 15- "j" 16- "j" 17- "j" 18