Color classification
Left 1 + right 3 (contact surface leather)
Right 3 + Imperial Concubine (contact surface genuine leather)
Left 3 + Right 3 (contact surface leather)
Right 3 + corner + imperial concubine (contact surface leather)
Right 3+1 + corner + imperial concubine (contact surface leather)
Right + corner + left 3 + left (contact surface leather)
Left 1 + right 3 [full leather]]
Right 3 + Imperial Concubine [full leather]]
Left 3 + Right 3 [Full Leather]]
Right 3 + corner + Imperial Concubine [full leather]]
Right 3+1 + corner + Imperial Concubine [full leather]]
Right expensive + corner + left 3 + left expensive [full leather]]