program ttext;
type cuv = set of char;
var c:cuv;
i:char;
str:boolean;
nrl,nrc,s: longint;
f,g: text;
begin
assign(f,'text.in');
assign(g,'text.out');
reset(f);rewrite(g);
for i:='A' to 'Z' do begin
 c:= c + [i];
end;
for i:='a' to 'z' do begin
 c:= c + [i];
end;
str:=false;
while not eof(f) do begin
 read(f,i);
 if i in c then begin
  nrl:=nrl+1;
  if str = false then
   nrc:=nrc+1;
  str:=true;
  end else
  str:= false;
end;
s:= nrl div nrc;
writeln(g,s);
close(f);close(g);
end.