Calling range for opponent who has gone all in first 4 hands in NLTRN

[mmix85]

a row

In a HU sit and go what range do you guys call with if the opponent has moved all in 4 hands in a row? How much of an edge do you wait for if hes presumably shoving any two cards? However, dont assume he will continue shoving any 2 for the whole match, but he might. Sorry if this question has already been answered before, im new posting here.