Write an algorithm that accepts a 2-digit number ranging from 20 to 99 and display all pair of 2-digit combinations that will sum up to your input. For example, let's assume that the user entered a 25, the algorithm should be able to display the following: 15+10, 14+11, 13+12 the positioning of these numbers doesn't make a difference so, if 15+10 is displayed, you don't have to display 10+15. HINT: There is a pattern on how the left digit is decremented and the right digit is incremented by 1