C11112331333132311331333133313331333132313121111331333132333133313331333231221   >>    C1111233133313231133133313331333133313231312111133133313233313331333133323122   <<    C11112331333132311331333133313331333132313121111331333132333133313331333231223   >>      C11112331333132311331333133313331333132313121111331333132333133313331333231222   >>