C11111211113313112113313331333133313331333132313331333133313331312323222121   >>    C1111121111331311211331333133313331333133313231333133313331333131232322212   <<    C11111211113313112113313331333133313331333132313331333133313331312323222123   >>      C11111211113313112113313331333133313331333132313331333133313331312323222122   >>