C1111233131211111211113313331333133313331122212111111331333132231112121   >>    C111123313121111121111331333133313331333112221211111133133313223111212   <<    C1111233131211111211113313331333133313331122212111111331333132231112123   >>      C1111233131211111211113313331333133313331122212111111331333132231112122   >>