C1111233131211111211113313231333133313331323331333133313223312121   >>    C111123313121111121111331323133313331333132333133313331322331212   <<    C1111233131211111211113313231333133313331323331333133313223312123   >>      C1111233131211111211113313231333133313331323331333133313223312122   >>