C1111233133313231133133313331333131211111331121211113313232112322121   >>    C111123313331323113313331333133313121111133112121111331323211232212   <<    C1111233133313231133133313331333131211111331121211113313232112322123   >>      C1111233133313231133133313331333131211111331121211113313232112322122   >>