Let $S_{\Bbb N}$ isbe the countable symmetric group of all finite permutations of the naturals with finite support and $A_{\Bbb N}$ --- the corresponding alternating group. ToHow to describe all maximal subgroups of its of typethese groups which are isomorphic to $S_{\Bbb N}$.? Is it possible to obtain the answer from well-known answers on the same question for the finite case?