C1111233131211111211113313331333133313331323223313231333133313223121   >>    C111123313121111121111331333133313331333132322331323133313331322312   <<    C1111233131211111211113313331333133313331323223313231333133313223123   >>      C1111233131211111211113313331333133313331323223313231333133313223122   >>