Click on two buttons one at a time to get an image

i have 13 buttons (1 or Ace - 13 or King). i also have 4 buttons those are the suits. (hearts, spades...). i want that when i will press a button from the 13 buttons let's say Ace and then i press a suit from the 4 buttons let's say hearts, the card ace of hearts will be saved to PlayerPrefs so i can use it in the next scene. the easy part is to save it for the PlayerPrefs but how do i make the system know that i have chosen the ace and the hearts?