C222123232321333131133133313331323133313233311232313233232222221311   >>    C22212323232133313113313331333132313331323331123231323323222222131   <<    C222123232321333131133133313331323133313233311232313233232222221313   >>      C222123232321333131133133313331323133313233311232313233232222221312   >>