Examples of these constructs called 'ushshaq [oosh-SHAK] turki and bayti [BYE-tea] are identical except for their nuclei. The Arabic word for gender lends its name to the smaller jins used to build equivalents of these constructs, many of which cannot be represented in 12TET [twelve tet]. Versions of these (15[1])constructs that are often associated with specific times of day divide the saptak into two collections of swara. Arabic and Indian analogues of these constructs are respectively known as maqāms and (10[1])(*) ragas. The (-5[2])presence or (10[1])absence of an augmented second distinguishes two of these constructs called “harmonic” and (-5[1])“natural.” These constructs are made of two tetrachords each containing a sequence of whole and half steps. For 10 points, name these ordered collections of notes that, like keys, are often divided into (10[1])major and minor. (10[1]0[1])■END■