C21221212121211331313233313131133132333132313223313231133132313232111111   >>    C2122121212121133131323331313113313233313231322331323113313231323211111   <<    C21221212121211331313233313131133132333132313223313231133132313232111113   >>      C21221212121211331313233313131133132333132313223313231133132313232111112   >>