CHALLENGE ACTIVITY 2.14.2: Outputting all combinations. Output all combinations of character variables a, b, and c. If a = 'X', b = y, and c = 'z', then the output is: xyz xzy yxz yzx zxy zyx Your code will be tested in three different programs, with a, b, c assigned with 'x, y, z, then with '#', 'S','%, then with '1', '2', '3'. 1 #include 2 using namespace std; 4 int main() char a; char b; char c; cin >> a; cin >> b; cinci 13 " Your solution goes here */ cout