The sestina has been subject to some variations, with changes being made to both the size and number of stanzas, and also to individual line length. A "double sestina" is the name given to either: two sets of six six-line stanzas, with a three-line envoy (for a total of 75 lines), or twelve twelve-line stanzas, with a six-line envoy (for a total of 150 lines). Examples of either variation are rare; "Ye Goatherd Gods" by Philip Sidney is a notable example of the former variation, while "The Complaint of Lisa" by Algernon Charles Swinburne is a notable example of the latter variation. In the former variation, the original pattern of line-ending words, i.e. that of the first stanza, recurs in the seventh stanza, and thus the entire change of pattern occurs twice throughout. In the second variation, the pattern of line-ending words returns to the starting sequence in the eleventh stanza; thus it does not, unlike the "single" sestina, allow for every end-word to occupy each of the stanza ends; end-words 5 and 10 fail to couple between stanzas.