function A = testsound(A,B,C,E,F,G,H);
z1 = [norm(A-E,'fro'),norm(B-E,'fro'),norm(C-E,'fro')];
z2 = [norm(A-F,'fro'),norm(B-F,'fro'),norm(C-F,'fro')];
z3 = [norm(A-G,'fro'),norm(B-G,'fro'),norm(C-G,'fro')];
z4 = [norm(A-H,'fro'),norm(B-H,'fro'),norm(C-H,'fro')];
A = [min(z1)==z1;min(z2)==z2;min(z3)==z3];

