Find a subset of \(U\) that is equivalent, but not equal, to the set: \(\{1, \mathrm{a}, \mathrm{s}, \mathrm{t}\}\).

For the following exercises, use the set of letters in the word largest as the set, \(U=\{1, \mathrm{a}, \mathrm{r}, \mathrm{g}, \mathrm{e}, \mathrm{s}, \mathrm{t}\}\).