C1212121231123232233131323223313233313233313223313132313231333311   >>    C121212123112323223313132322331323331323331322331313231323133331   <<    C1212121231123232233131323223313233313233313223313132313231333313   >>      C1212121231123232233131323223313233313233313223313132313231333312   >>