var cuvinte,lungime:longint;
    c:char;
    f:text;
begin
assign(f,'text.in');
reset(f);
repeat
read(f,c);
if (c in ['a'..'z']) or (c in ['A'..'Z']) then lungime:=lungime+1
                                          else cuvinte:=cuvinte+1;
until eoln(f);
close(f);
assign(f,'text.out');
rewrite(f);
write(f,lungime div cuvinte);
close(f);
end.