C1111233131211111211113313331333133313331312331333132333112312311   >>    C111123313121111121111331333133313331333131233133313233311231231   <<    C1111233131211111211113313331333133313331312331333132333112312313   >>      C1111233131211111211113313331333133313331312331333132333112312312   >>