C131121333133313233213331333133313331333133313231333131121131133133322123121   >>    C13112133313331323321333133313331333133313331323133313112113113313332212312   <<    C131121333133313233213331333133313331333133313231333131121131133133322123123   >>      C131121333133313233213331333133313331333133313231333131121131133133322123122   >>