C31313132333131133132233132233132213233313233313221333132212121   >>    C3131313233313113313223313223313221323331323331322133313221212   <<    C31313132333131133132233132233132213233313233313221333132212123   >>      C31313132333131133132233132233132213233313233313221333132212122   >>