C21221212121211331313233313131133132333132313223313231323222331111   >>    C2122121212121133131323331313113313233313231322331323132322233111   <<    C21221212121211331313233313131133132333132313223313231323222331113   >>      C21221212121211331313233313131133132333132313223313231323222331112   >>