var n,k:longint;
    s:char;
    cuv:boolean;
    f,g:text;
begin
assign(f,'text.in');
reset(f);
assign(g,'text.out');
rewrite(g);
n:=0;
k:=0;
cuv:=false;
while not eof(f) do
 begin
 read(f,s);
 if ((s>='a') and (s<='z')) or ((s>='A') and (s<='Z')) then
  begin
  cuv:=true;
  inc(n);
  end
 else
  if cuv=true then
   begin
   cuv:=false;
   inc(k);
   end;
 end;
writeln(g,n div k);
close(f);
close(g);
end.