program Stroki2;
var s        : string;
   i        : integer;
   in_word  : boolean;
   count    : integer;
const letters  : set of char = ['a'..'z', 'A'..'Z'];
begin
 count:=0; in_word:=false;
 readLn(s);

 for i:=1 to length(s) do
 begin
    if (s[i] in letters) and (not in_word) then
    begin
        in_word:=true; inc(count)
    end
    else if not (s[i] in letters) and in_word then
    begin
	in_word:=false
    end
 end;

 writeLn(count);
 readln;
end.