function [Out iso] = IsomorphismChecker(A1, A2)
%[Out iso] = IsomorphismChecker(A1, A2)
%Inputs: Adjacentcy matrices A1, A2 of two simple graphs w/
%same number of vertices
%Outputs:  Out = 1 if graphs are isomorphic, = 0 if not
%iso = perm of vertices that give isomorphism if one exists,
%if not iso = 0
[n m] = size(A1); %n = number of vertices
Perms = perms(1:n);
[r c] = size(Perms); %r = number of permutations of vertices
for i = 1:r
    perm = Perms(i,:);
    M= A1(perm, perm);
    if sum(sum(M==A2))== n^2
        Out = 1; iso = perm; return
    end
end
Out = 0; iso = 0;