program networkip;
var
  dn,dm,ipmax,ipmin:array [1..4] of byte;
  network,mask,bipmax,bipmin:array [1..4,1..8] of 0..1;
  s,max,min:string;
  code,p,m,i:integer;
procedure init;
begin
  assign (input,'networkip.in');
  reset (input);
  readln (m);
  readln (s);s:=s+'.';
  max:=s;min:=s;
  for i:=2 to m do begin
    readln (s);s:=s+'.';
    if s>max then max:=s;
    if s<min then min:=s;
  end;
  for i:=1 to 4 do begin
    p:=pos('.',max);
    val(copy(max,1,p-1),ipmax[i],code);
    delete(max,1,p);
  end;
  for i:=1 to 4 do begin
    p:=pos('.',min);
    val(copy(min,1,p-1),ipmin[i],code);
    delete(min,1,p);
  end;
  close (input);
end;
procedure binary;
var i,j:integer;
begin
  fillchar (bipmax,sizeof(bipmax),0);
  fillchar (bipmin,sizeof(bipmin),0);
  for i:=1 to 4 do begin
    j:=9;
    while ipmax[i]<>0 do begin
      dec(j);
      bipmax[i,j]:=ipmax[i] mod 2;
      ipmax[i]:=ipmax[i] div 2;
    end;
    j:=9;
    while ipmin[i]<>0 do begin
      dec(j);
      bipmin[i,j]:=ipmin[i] mod 2;
      ipmin[i]:=ipmin[i] div 2;
    end;
  end;
end;
procedure build;
var i,j,bi,bj:integer;
begin
  bi:=4;bj:=0;
  for i:=1 to 4 do begin
    for j:=1 to 8 do if bipmax[i,j]<>bipmin[i,j] then begin
    bi:=i-1;bj:=j-1;
    break;
    end;
  end;
  for i:=1 to bi do for j:=1 to 8 do mask[i,j]:=1;
  for i:=bi+1 to 4 do for j:=1 to bj do mask[i,j]:=1;
  fillchar (network,sizeof(network),0);
  for i:=1 to bi do for j:=1 to 8 do network[i,j]:=bipmin[i,j];
  for i:=bi+1 to 4 do for j:=1 to bj do network[i,j]:=bipmin[i,j];
end;
procedure decimal;
var i,j:integer;
begin
  fillchar (dn,sizeof(dn),0);
  fillchar (dm,sizeof(dm),0);
  for i:=1 to 4 do for j:=1 to 8 do dn[i]:=dn[i]+network[i,j] shl (8-j);
  for i:=1 to 4 do for j:=1 to 8 do dm[i]:=dm[i]+mask[i,j] shl (8-j);
end;
procedure print;
begin
  assign (output,'networkip.out');
  rewrite (output);
  write (dn[1]);
  for i:=2 to 4 do write ('.',dn[i]);
  writeln;
  write (dm[1]);
  for i:=2 to 4 do write ('.',dm[i]);
  writeln;
  close (output);
end;
begin
  init;
  binary;
  build;
  decimal;
  print;
end.