404. That’s an error.

The requested URL /custom?q=tough&safe=active&client=pub-4217847656638922&cof=FORID:13%3BAH:left%3BCX:ArticlesSE%3BL:https://www.google.com/intl/en/images/logos/custom_search_logo_sm.gif%3BLH:30%3BLC:%230000FF%3BVLC:%23663399%3B&cx=partner-pub-4217847656638922:9779817432&adkw=AELymgXMeUrzn-m-DllQGzjYR-0dyNNX9ujLclm-AwFZgbXV24VezazVZR_j_EUCHOhLVUMHRlfsrw1yXU-ytEugxT5j4JE3yQrc2WKsOaB8xPg69fmuT_dkGYNkbnwLhxH5zezLRIElF8smmm7qoRlqtCrSASiRTQ&hl=en&ie=UTF-8&oe=UTF-8&prmd=ivns&ei=9EO0WJGgLImUgAaqkZ_4AQ&start=70&sa=N was not found on this server. That’s all we know.