C11111211113313112113313331333133313331333132313231333133312123311   >>    C1111121111331311211331333133313331333133313231323133313331212331   <<    C11111211113313112113313331333133313331333132313231333133312123313   >>      C11111211113313112113313331333133313331333132313231333133312123312   >>