program borlpasc;
var
s, sl: string;
k, i: integer;
f, f1: text;
begin
assign(f, 'text.txt');
reset(f);
assign(f1, 'text1.txt');
rewrite(f1);
readln(f, s);
k := 0;
while not eof(f) do
begin
k := k + 1;
delete(s, pos('story', s), length('story'));
end;
write(f1, k);
close(f);
close(f1);
end.