var s:string;
    c1,c2,m1,m2,i:longint;
    t:array [1..2] of longint;
    t1,t2 : longint;
procedure svoy_del(var s:string);
begin
 while not(s[1] in ['0'..'9']) do delete(s,1,1);
end;

function svoy_val(var s:string):integer;
var c:integer;
begin
 c:=0;
 while s[1] in ['0'..'9'] do
 begin
  c:=c*10+ord(s[1])-ord('0');
  delete(s,1,1);
 end;
 svoy_val:=c;
end;

begin
 fillchar(t,sizeof(t),0);
 for i:=1 to 2 do
 begin
  readln(s); s:=s+' 9'; svoy_del(s);
  c1:=svoy_val(s);svoy_del(s);
  m1:=svoy_val(s);svoy_del(s);
  c2:=svoy_val(s);svoy_del(s);
  m2:=svoy_val(s);svoy_del(s);
  if m2<m1 then begin m2:=m2+60; c2:=c2-1;end;
  if c2<c1 then begin c2:=c2+24;end;
  c1:=c2-c1;
  m1:=m2-m1;
  t[i]:=m1+c1*60;
  if t[i]>12*60 then t[i]:=24*60-t[i];
 end;
 t1:=(round(abs(t[1]-t[2])/120));
 t1:=t1 mod 5;
 writeln(t1);
end.

> var s:string;
>     c1,c2,m1,m2,i:longint;
>     t:array [1..2] of longint;
>     t1,t2 : longint;
> procedure svoy_del(var s:string);
> begin
>  while not(s[1] in ['0'..'9']) do delete(s,1,1);
> end;
>
> function svoy_val(var s:string):integer;
> var c:integer;
> begin
>  c:=0;
>  while s[1] in ['0'..'9'] do
>  begin
>   c:=c*10+ord(s[1])-ord('0');
>   delete(s,1,1);
>  end;
>  svoy_val:=c;
> end;
>
> begin
>  fillchar(t,sizeof(t),0);
>  for i:=1 to 2 do
>  begin
>   readln(s); s:=s+' 9'; svoy_del(s);
>   c1:=svoy_val(s);svoy_del(s);
>   m1:=svoy_val(s);svoy_del(s);
>   c2:=svoy_val(s);svoy_del(s);
>   m2:=svoy_val(s);svoy_del(s);
>   if m2<m1 then begin m2:=m2+60; c2:=c2-1;end;
>   if c2<c1 then begin c2:=c2+24;end;
>   c1:=c2-c1;
>   m1:=m2-m1;
>   t[i]:=m1+c1*60;
>   if t[i]>12*60 then t[i]:=24*60-t[i];
>  end;
>  t1:=(round(abs(t[1]-t[2])/120));
>  t1:=t1 mod 5;
>  writeln(t1);
> end.
>