C222123232321333131133133313331323132313331312112113233232211211   >>    C22212323232133313113313331333132313231333131211211323323221121   <<    C222123232321333131133133313331323132313331312112113233232211213   >>      C222123232321333131133133313331323132313331312112113233232211212   >>