var
f,g:text;
i,t,a,b:longint;
function cmmdc(a,b:longint):longint;
begin
if a=0 then cmmdc:=b;
if b=0 then cmmdc:=a;
if (a<>0) and (B<>0) then if a=b then cmmdc:=a
else cmmdc:=cmmdc(a mod b,b mod a);
end;
begin
assign(f,'euclid2.in');reset(f);
assign(g,'euclid2.out');rewrite(g);
readln(f,t);
for i:=1 to t do
begin
readln(f,a,b);
writeln(g,cmmdc(a,b));
end;
close(g);
end.