C212212121212113313132333131311331323331323132233131133132313223313113111   >>    C21221212121211331313233313131133132333132313223313113313231322331311311   <<    C212212121212113313132333131311331323331323132233131133132313223313113113   >>      C212212121212113313132333131311331323331323132233131133132313223313113112   >>