EXCEL IF Conditional Statement

I want to write an if statement in excel that

Row 1	A	B	C
Row 2	3	5

The values for A2 and B2 are random integer variables from 1 to 5.

I need to write an if statement that gives value of 5 if the values of (A, B) are (5,5), (4,5), (5,4), (3,5), or (5,3) and gives a value of 3 if the values of (A,B) are (5,1), (4,2), (5,2), (2,3), (3,3), (4,3), (2,4), (3,4), (2,5) and gives a value of 1 if the (A, B) are (1,1) (2,1), (3,1), (4,1), (1, 2), (2,2), (2,3), (1,3), (1,4), and (1,5) ?

Please write down the function to calculate the cell value of C2 ?