C131121333133313233213331333133313231333133313331333132321112311   >>    C13112133313331323321333133313331323133313331333133313232111231   <<    C131121333133313233213331333133313231333133313331333132321112313   >>      C131121333133313233213331333133313231333133313331333132321112312   >>