Program iatext;
var f,g:text;
k,i,cuv:integer;
c:char;
begin
assign(f,'text.in'); reset(f);
assign(g,'text.out'); rewrite(g);
k:=0;
i:=0;
cuv:=0;
while not eof(f) do begin
read(f,c);
if c in ['A'..'Z','a'..'z'] then begin inc(i);
if k=0 then inc(cuv);
k:=1;
end else k:=0;
end;
writeln(g,i div cuv);
close(f);
close(g);
end.