Program bt4_1;
Var a,b:integer;
Begin
write('nhap a,b:');
readln(a,b);
if (a mod b) = 0 then writeln(b,' la uoc cua ',a)
else writeln(b,' khong la uoc cua ',a);
if (b mod a) = 0 then writeln(a,' la uoc cua ',b)
else writeln(a,' khong la uoc cua ',b);
readln;
End.