C131121333133313233213331333133313331333133313231333131122213231221   >>    C13112133313331323321333133313331333133313331323133313112221323122   <<    C131121333133313233213331333133313331333133313231333131122213231223   >>      C131121333133313233213331333133313331333133313231333131122213231222   >>