C131121333133313233213331333133313331333133313331333133313123223211113313132321   >>    C13112133313331323321333133313331333133313331333133313331312322321111331313232   <<    C131121333133313233213331333133313331333133313331333133313123223211113313132323   >>      C131121333133313233213331333133313331333133313331333133313123223211113313132322   >>