Write a method `diceSum`

that accepts an integer parameter representing a number of
6-sided dice to roll, and also a desired sum. The method returns only combinations that adds
up to exactly that sum.

The method should return a vector of all combinations in string type where each dice result is
concatenated together. For instance, the results of 2 and 6 as two dice rolls should be displayed as
a string of `{26}`

.

Examples:

`diceSum(2,7) ==> {"{16}","{25}","{34}","{43}","{52}","{61}"}`

Need a **hand?** Try out these hints, one at a time.

if there are no more choices to make: stop.

else, for each available choice C:

Choose C.

Explore the remaining choices.

Un-choose C. (backtrack!)

public static Vector<String> diceSum(int dice, int desiredSum) { }

**C**

**Java**

**Python**