Program euclid;
Var f,g:text;
a,b,t,i:longint;
Function cmmdc(a,b:longint):longint;
Begin
if b = 0 then cmmdc:=a else cmmdc:=cmmdc(b,a mod b);
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(f);close(g);
End.