C1111233133313231133133313331333133313231121333133313331211111333133112312311   >>    C111123313331323113313331333133313331323112133313331333121111133313311231231   <<    C1111233133313231133133313331333133313231121333133313331211111333133112312313   >>      C1111233133313231133133313331333133313231121333133313331211111333133112312312   >>