C22212323232133313113313331333132313331323132321111311213232211   >>    C2221232323213331311331333133313231333132313232111131121323221   <<    C22212323232133313113313331333132313331323132321111311213232213   >>      C22212323232133313113313331333132313331323132321111311213232212   >>