How to get rid of the rotation code repetition?

Question

Unity

My character rotates depending on which buttons are pressed. Because of this, there is a repetition of the same thing:

if(Input.GetKey(KeyCode.D) && Input.GetKey(KeyCode.W) && !Input.GetKey(KeyCode.A) && !Input.GetKey(KeyCode.S))
        {
             angle = Quaternion.Euler(0, 45, 0);
        }
        else if(Input.GetKey(KeyCode.W) && Input.GetKey(KeyCode.A) && !Input.GetKey(KeyCode.D) && !Input.GetKey(KeyCode.S))
        {
             angle = Quaternion.Euler(0, -45, 0);
        }
//  и так далее

What can be done to fix this?