C11112331333132311331333133313331333132312323133313331322212121   >>    C1111233133313231133133313331333133313231232313331333132221212   <<    C11112331333132311331333133313331333132312323133313331322212123   >>      C11112331333132311331333133313331333132312323133313331322212122   >>