C1111233131211111211113313331333133313331333133313331333132313123232221   >>    C111123313121111121111331333133313331333133313331333133313231312323222   <<    C1111233131211111211113313331333133313331333133313331333132313123232223   >>      C1111233131211111211113313331333133313331333133313331333132313123232222   >>