C1212121231123232233131323223313233313233313223313231133132323323111   >>    C121212123112323223313132322331323331323331322331323113313232332311   <<    C1212121231123232233131323223313233313233313223313231133132323323113   >>      C1212121231123232233131323223313233313233313223313231133132323323112   >>