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 '#, $", "%', then with '1', '2', '3'. 1 #include using namespace std; 1 test passed 4 int main() { char a; char b; char c; All tests passed REGOWN cin >> a; cin >> b; cin >> c; /* Your solution goes here */ cout