C212212121212113313132333131311331323331323132233132313211232323321   >>    C21221212121211331313233313131133132333132313223313231321123232332   <<    C212212121212113313132333131311331323331323132233132313211232323323   >>      C212212121212113313132333131311331323331323132233132313211232323322   >>