x2

x3

x1

x4

x5

x6

x7

x8

x9

x10

x11

x12

x13.

x14

x15

x16

x17

x18

x20

x21

x22

x23

x24

x25

x26

x27

x28

x29

x30

x31

x32

x33

x34

x35

x36

x37

x38

x39

x40

x41