program EmberAsh;
label 1;
const
cc:array[0..9]of char=('0','1','2','3','4','5','6','7','8','9');
nn:array['0'..'9']of integer=(0,1,2,3,4,5,6,7,8,9);
ttt:array[0..20]of longint=(1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,65536,131072,262144,524288,1048576);
var
i,j,k,n,m,temp,tt:longint;
a:array[1..100]of longint;
t:array[1..4]of longint;//十进制
ip:array[1..1000,1..4]of integer;//存放ip
ips:array[1..1000]of string;//ip 2进制
head:longint;
s:string;//二进制
tail:longint;
w1:array[1..32]of integer;
ziwangyanma,wangluodizhi:string;
st:string;
ch:char;
fin,fout:text;

procedure tentwo(x:longint);
var
i,j,k,p:longint;
s:string;
begin
p:=0;
while x>0 do
  begin
  inc(p);
  a[p]:=x mod 2;
  x:=x div 2;
  end;
end;

BEGIN
assign(fin,'networkip.in');reset(fin);
assign(fout,'networkip.out');rewrite(fout);
readln(fin,m);
head:=1;
for i:=1 to m do
  begin
  tail:=1;
  while not(eoln(fin)) do
    begin
    read(fin,ch);
    if ch<>'.' then
      st:=st+ch
        else
        begin
        val(st,ip[i,tail]);
        st:='';
        inc(tail);
        end;
    end;
  val(st,ip[i,tail]);
  st:='';
  readln(fin);
  end;
for i:=1 to m do
  for j:=1 to 4 do
    begin
    for k:=1 to 8 do a[k]:=0;
    tentwo(ip[i,j]);
    for k:=8 downto 1 do
      ips[i]:=ips[i]+cc[a[k]];
    end;
//求n
for i:=1 to 32 do
  begin
  ch:=ips[1,i];
  for j:=2 to m do
    if ips[j,i]<>ch then
      begin
      n:=i;
      goto 1;
      end;
  end;
//求n
1:
n:=32-n+1;
for i:=1 to 32-n do
  ziwangyanma:=ziwangyanma+'1';
for i:=1 to n do
  ziwangyanma:=ziwangyanma+'0';
for i:=1 to 32-n do
  wangluodizhi:=wangluodizhi+ips[1,i];
for i:=1 to n do
  wangluodizhi:=wangluodizhi+'0';
j:=0;
k:=0;
s:=wangluodizhi;
for i:=8 downto 1 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=16 downto 9 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=24 downto 17 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=32 downto 25 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
writeln(fout);
//网络地址
j:=0;
k:=0;
s:=ziwangyanma;
for i:=8 downto 1 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=16 downto 9 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=24 downto 17 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
write(fout,'.');
k:=0;
j:=0;
for i:=32 downto 25 do
  begin
  j:=j+nn[s[i]]*ttt[k];
  inc(k);
  end;
write(fout,j);
writeln(fout);
//子网掩码
close(fin);close(fout);
END.