So, children, first list all ordered pairs of your set—with four elements, that's 16 pairs. For reflexivity, ensure (a,a) is present for all a; for symmetry, if (a,b) is there, (b,a) must be too; for transitivity, if (a,b) and (b,c) exist, check for (a,c). I say this like fixing my father's radio, where every connection must be just so, or the whole story he's telling simply won't come through clear.
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