public string ChangeInput()
{
string input;
UserInterface.RecipeMenuTitle();
input = UserInterface.GetUserInput("To modify the recipe, type 'lemons', 'sugar', 'ice', 'price', or 'done'").ToLower();
while (input != "price" && input != "lemons" && input != "sugar" && input != "ice" && input != "done")
{
input = UserInterface.RetryGetUserInput(input + " is not a valid respone, try again!").ToLower();
}
return(input);
}