C213211331333131212111133133313231333132313331322331323132213121   >>    C21321133133313121211113313331323133313231333132233132313221312   <<    C213211331333131212111133133313231333132313331322331323132213123   >>      C213211331333131212111133133313231333132313331322331323132213122   >>