C222123232321333131133133313331323133313233311232313233232311232212211   >>    C22212323232133313113313331333132313331323331123231323323231123221221   <<    C222123232321333131133133313331323133313233311232313233232311232212213   >>      C222123232321333131133133313331323133313233311232313233232311232212212   >>