Systematic Joseki 4-4 3-3 3-4 4-3 5-3 5-2 6-3
Keywords: Joseki
Summary - Joseki - San san under Hoshi in a general case.
keeps things simple letting White have the corner in sente in exchange for the outside influence.
White normally pushes at a to get a base in sente.[1]
[1] Changing the order of a and b also seems possible and leads to the same result?.