program Text2;
var f:text;t:string;n,i:longint;k:0..1;cuv,lit,rez:real;
begin
 assign(f,'text.in');
 reset(f);
 readln(f,t);
 close(f);
 n := length(t); k := 0; lit := 0;cuv := 0;
 for i := 1 to n do
 begin
  if (upcase(t[i]) >='A') and (upcase(t[i]) <= 'Z') then
  begin
    lit := lit + 1;
    if k = 0  then
    begin
      cuv := cuv + 1;
      k := 1;
    end;
  end
                                                    else
   k := 0;
 end;
 rez := int(lit/cuv);
 assign(f,'text.out');
 rewrite(f);
 write(f,rez:0:0);
 close(f);
readln;
end.