C11112331333132311331333133313331333132313121111331333132333133313231121132311   >>    C1111233133313231133133313331333133313231312111133133313233313331323112113231   <<    C11112331333132311331333133313331333132313121111331333132333133313231121132313   >>      C11112331333132311331333133313331333132313121111331333132333133313231121132312   >>