C212212121212113313132333131311331323331323132233131133132321123231111   >>    C21221212121211331313233313131133132333132313223313113313232112323111   <<    C212212121212113313132333131311331323331323132233131133132321123231113   >>      C212212121212113313132333131311331323331323132233131133132321123231112   >>