Program cel;
var f,g:text;
    c:char;
    cuv,nr,x:longint;
Begin
Assign(f,'text.in');Reset(f);
Assign(g,'text.out');Rewrite(g);
cuv:=0;
nr:=0;
While not eoln(f) do
 Begin
  Read(f,c);
  x:=nr;
  While not (upcase(c) in ['A'..'Z']) and (not eoln(f)) do Read(f,c);
  While (upcase(c) in ['A'..'Z']) and (not eoln(f)) do
   Begin
    inc(nr);
    Read(f,c);
   end;
  If upcase(c) in ['A'..'Z'] then inc(nr);
  If x<>nr then inc(cuv);
 end;
Write(g,nr div cuv);
Close(f);
Close(g);
end.