C212212121212113313132333131311331323331323132233132313113313232321   >>    C21221212121211331313233313131133132333132313223313231311331323232   <<    C212212121212113313132333131311331323331323132233132313113313232323   >>      C212212121212113313132333131311331323331323132233132313113313232322   >>