C21221212121211331313233313131133132333132313223313232211311331   >>    C2122121212121133131323331313113313233313231322331323221131133   <<    C21221212121211331313233313131133132333132313223313232211311333   >>      C21221212121211331313233313131133132333132313223313232211311332   >>