expected input values are from 9 to 21

Left Spokes
display
L1
L2
L3
L4
L5
L6
L7
L8
L9

L10
L11
L12
L13
L14
L15
L16
L17
L18
Right Spokes
display
R1
R2
R3
R4
R5
R6
R7
R8
R9

R10
R11
R12
R13
R14
R15
R16
R17
R18