C1212121231123232233131323223313233313233313223313132333132313232331231   >>    C121212123112323223313132322331323331323331322331313233313231323233123   <<    C1212121231123232233131323223313233313233313223313132333132313232331233   >>      C1212121231123232233131323223313233313233313223313132333132313232331232   >>