How do I go about getting full Flickr URLs?

Example: https://www.flickr.com/photos/167981955@N07/ Thumbnail URL https://live.staticflickr.com/65535/51169850549_06dab168fa_n.jpg Viewer https://www.flickr.com/photos/167981955@N07/51169850549/in/dateposted/ Full (?) URL https://live.staticflickr.com/65535/51169850549_243549834b_h.jpg