C1212121231123232233131323223313233313231313331311331323112331121   >>    C121212123112323223313132322331323331323131333131133132311233112   <<    C1212121231123232233131323223313233313231313331311331323112331123   >>      C1212121231123232233131323223313233313231313331311331323112331122   >>