C131121333133313233213331333133313331333133313231333131122222321   >>    C13112133313331323321333133313331333133313331323133313112222232   <<    C131121333133313233213331333133313331333133313231333131122222323   >>      C131121333133313233213331333133313331333133313231333131122222322   >>