C222123232321333131133133313331323133313233311232313233232112213211   >>    C22212323232133313113313331333132313331323331123231323323211221321   <<    C222123232321333131133133313331323133313233311232313233232112213213   >>      C222123232321333131133133313331323133313233311232313233232112213212   >>