C22212323232133313113313331333132313331323123233232132233121221   >>    C2221232323213331311331333133313231333132312323323213223312122   <<    C22212323232133313113313331333132313331323123233232132233121223   >>      C22212323232133313113313331333132313331323123233232132233121222   >>