<Tr> <Th> 0 </Th> <Td> </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Th> 0 </Th> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> </Tr> <Tr> <Th> </Th> <Td> 0 </Td> <Td> </Td> <Td> 0 </Td> <Td> 0 </Td> <Th> </Th> <Td> </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> </Tr> <Tr> <Th> </Th> <Td> 0 </Td> <Td> 0 </Td> <Td> </Td> <Td> 0 </Td> <Th> </Th> <Td> </Td> <Td> </Td> <Td> 0 </Td> <Td> 0 </Td> </Tr> <Tr> <Th> </Th> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> </Td> <Th> </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 0 </Td> </Tr>

An important application of a johnson counter is