C1111233131211111211113313331333133313232321333133313231331121123231123121   >>    C111123313121111121111331333133313331323232133313331323133112112323112312   <<    C1111233131211111211113313331333133313232321333133313231331121123231123123   >>      C1111233131211111211113313331333133313232321333133313231331121123231123122   >>