C21231322221311331311211312111133132313223313331322331311331333133112323233231   >>    C2123132222131133131121131211113313231322331333132233131133133313311232323323   <<    C21231322221311331311211312111133132313223313331322331311331333133112323233233   >>      C21231322221311331311211312111133132313223313331322331311331333133112323233232   >>