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- and are two set of values.
- This function is making a pair of two set of values.
- In , and are two set of values to make a pair.
- So this function constructs a pair object with its first element set to x and its second element set to y.
- So it is showing the pair of the first element in X with all the element in Y.
- Then next second element in X with all the element in Y and so on.