C213211331333131212111133133313231333132313331333131333132232211   >>    C21321133133313121211113313331323133313231333133313133313223221   <<    C213211331333131212111133133313231333132313331333131333132232213   >>      C213211331333131212111133133313231333132313331333131333132232212   >>