C222123232321333131133133313331323133313233311232313233232322121   >>    C22212323232133313113313331333132313331323331123231323323232212   <<    C222123232321333131133133313331323133313233311232313233232322123   >>      C222123232321333131133133313331323133313233311232313233232322122   >>