program filip;
var s1,s2: string;
    i,n,j,x,y: integer;
    a,b:array[1..3] of integer;

begin
              readln(s1);
              readln(s2);


         if s1[3]>s2[3] then for i:=3 downto 1 do write(s1[i])
         else if (s1[3]=s2[3]) and (s1[2]> s2[2]) then for i:=3 downto 1 do write(s1[i])
         else if (s1[3]=s2[3]) and (s1[2]=s2[2]) and (s1[1]> s2[1]) then for i:=3 downto 1 do write(s1[i])
         else if (s1[3]=s2[3]) and (s1[2]=s2[2]) and (s1[1]=s2[1]) then for i:=3 downto 1 do write(s1[i])
         else for i:=3 downto 1 do write(s2[i]);


end.