<Tr> <Td> Billy Mayhew </Td> <Td> Daniel Brocklebank </Td> <Td> 2014--</Td> </Tr> <Tr> <Td> Cathy Matthews </Td> <Td> Melanie Hill </Td> <Td> 2015--</Td> </Tr> <Tr> <Td> Aidan Connor </Td> <Td> Shayne Ward </Td> <Td> 2015--</Td> </Tr> <Tr> <Td> Alex Warner </Td> <Td> Liam Bairstow </Td> <Td> 2015--</Td> </Tr>

How many characters are there in coronation street