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Long Metre or Long Measure, abbreviated as L.M. or LM, is a poetic metre consisting of four line stanzas, or quatrains, in iambic tetrameter with alternate rhyme pattern a-b-a-b. The term is also used in the closely related area of hymn metres. When the poem is used as a sung hymn, the metre of the text is denoted by the syllable count of each line; for long metre, the count is denoted by 8.8.8.8, 88.88, or 88 88, depending on style.