C11111211113313112113313331333133313221333133313231323331323132313233121   >>    C1111121111331311211331333133313331322133313331323132333132313231323312   <<    C11111211113313112113313331333133313221333133313231323331323132313233123   >>      C11111211113313112113313331333133313221333133313231323331323132313233122   >>