program ex(f1,f2);
 type
  zn=array [1..1009] of string;
  ka=array [0..9] of integer;
  la=array [0..4] of string;
 var
  a:zn; f1,f2:text; s,s2,ym,ip,now:string;
  i,j,k,l,p,m,n,ansn:longint; two:ka;
  ans1,ans2:la; nows:string;
 function zhuanhuan(s:string):string;
  var
   i,j,k,x,code:integer; s2,s3,s4:string;
  begin
   val(s,x,code);
   s2:='';
   while x<>0 do
    begin
     s2:=s2+char((x mod 2)+48);
     x:=x div 2;
    end;
   l:=length(s2);
   s3:='';
   for i:=1 to l do s3:=s3+'0';
   for i:=1 to l do s3[l-i+1]:=s2[i];
   if l<8 then begin
   s4:='';
   for i:=1 to 8-l do s4:=s4+'0';
   s3:=s4+s3;
   end;
   exit(s3);
  end;
 function shijinzhi(s:string):string;
  var
   i,j,k,x:integer; s2:string;
  begin
   x:=0;
   for i:=8 downto 1 do
    if s[i]='1' then
     begin
      x:=x+two[8-i];
     end;
   str(x,s2);
   exit(s2);
  end;



 begin
  assign(f1,'networkip.in'); reset(f1);
  assign(f2,'networkip.out'); rewrite(f2);
  readln(f1,n);
  two[1]:=2; two[0]:=1;
  for i:=2 to 8 do two[i]:=two[i-1]*2;
  for i:=1 to n do
   begin
    readln(f1,s);
    for k:=1 to 3 do
    begin
    s2:=copy(s,1,pos('.',s)-1);
    s2:=zhuanhuan(s2);
    a[i]:=a[i]+s2;
    delete(s,1,pos('.',s));
    end;
    s2:=zhuanhuan(s);
    a[i]:=a[i]+s2;
   end;
  now:=a[1];
  for i:=2 to n do
   begin
    for j:=1 to 32 do
     if now[j]<>a[i][j] then break;
    now:=copy(now,1,j-1);
   end;
  ansn:=32-length(now);
  for i:=1 to (32-ansn) do ym:=ym+'1';
  for i:=1 to ansn do ym:=ym+'0';

  ip:=now;
  while length(ip)<32 do ip:=ip+'0';
  for i:=1 to 4 do
  begin
  nows:=copy(ip,1,8);
  delete(ip,1,8);
  ans1[i]:=shijinzhi(nows);
  end;
  for i:=1 to 4 do
   begin
   nows:=copy(ym,1,8);
   delete(ym,1,8);
   ans2[i]:=shijinzhi(nows);
   end;
  for i:=1 to 3 do write(f2,ans1[i],'.');  writeln(f2,ans1[4]);
  for i:=1 to 3 do write(f2,ans2[i],'.');  writeln(f2,ans2[4]);
  close(f2);
  close(f1);
 end.