C21221212121211331313233313131133132333132313223313231322331111   >>    C2122121212121133131323331313113313233313231322331323132233111   <<    C21221212121211331313233313131133132333132313223313231322331113   >>      C21221212121211331313233313131133132333132313223313231322331112   >>