func main()
	var n: int :: cui@inputInt()
	var a: []int :: #[n]int
	for i(0, n - 1)
		do a[i] :: cui@inputInt()
	end for
	
	var mp: dict<int, int> :: #dict<int, int>
	for i(0, n - 1)
		do mp.add(a[i], mp.get(a[i], &) + 1)
	end for
	
	var ans: int :: 0
	var keys: []int
	block
		var keyList: List :: #List
		class List()
			+var li: list<int>
			*func ctor()
				do me.li :: #list<int>
			end func
		end class
		do mp.forEach(callback, keyList $ kuin@Class)
		func callback(key: int, value: int, data: kuin@Class): bool
			do(data $ List).li.add(key)
			ret true
		end func
		do keys :: keyList.li.toArray()
	end block
	
	for i(0, ^keys)
		for j(i + 1, ^keys)
			for k(j + 1, ^keys)
				do ans :+ mp.get(keys[i], &) * mp.get(keys[j], &) * mp.get(keys[k], &)
			end for
		end for
	end for
	do ans :% 10 ^ 9 + 7
	do cui@print("\{ans}\n")
end func