C11111211113313112113313331333132313331322132333133313232213331311212121   >>    C1111121111331311211331333133313231333132213233313331323221333131121212   <<    C11111211113313112113313331333132313331322132333133313232213331311212123   >>      C11111211113313112113313331333132313331322132333133313232213331311212122   >>