It is a grouping of lines within a poem that is known as a "stanza" in poetry. A Heroic Quatrain is a traditional poetry composed of four lines of alternating iambic pentameter rhyming. There are fifteen different rhyme schemes, but the most popular and traditional are: AAAA, ABAB, and ABB. Many consider The Iliad by Homer to be the greatest epic of all time because it contains the vast majority of elements that later became important to the genre: action, adventure, betrayal, revenge, love, tragedy. Homer's work was so influential that many subsequent epics and poems were compared to The Iliad. The Odyssey is one such example, being considered the successor to The Iliad because of their similar structure, style, and content. Both poems tell the story of a Greek warrior named Odysseus as he travels home after the Trojan War. However, while The Odyssey focuses on his adventures after leaving Troy, The Iliad covers his quest to get back home to Greece after the war has ended. Other classics that use the heroic quatrain include William Shakespeare's Henry V, John Milton's Paradise Lost, and Goethe's Faust II. Modern writers have also used the heroic quatrain format, including Alexander Pope, Samuel Johnson, and Percy Bysshe Shelley. Thomas Hardy is another modern writer who uses this rhyme scheme frequently in his poems.