C21221212121211331313233313131133132333132313223313232233132312231   >>    C2122121212121133131323331313113313233313231322331323223313231223   <<    C21221212121211331313233313131133132333132313223313232233132312233   >>      C21221212121211331313233313131133132333132313223313232233132312232   >>