<Tr> <Th> 4 - 10 </Th> <Td> A reversal of the ten code "10 - 4," when asking if someone agrees with something said or if one's transmission was received . ("That was a nasty wreck . Four - ten?") </Td> </Tr> <Tr> <Th> 5 by 5 </Th> <Td> indicates that another CB user can be heard clearly . An exceptionally clear / strong transmission is described as "wall - to - wall and treetop tall ." </Td> </Tr> <Tr> <Th> 10 - 4 </Th> <Td> Acknowledged; can also be used to denote or emphasize an agreement ("That's a big 10 - 4 ."). </Td> </Tr> <Tr> <Th> 10 - 6 </Th> <Td> Busy; stand by . </Td> </Tr>

Where did 10 4 good buddy come from