var s:string;
f,g:text;
c,j,i:longint;
begin
assign(f,'text.in');reset(f);
assign(g,'text.out');rewrite(g);
readln(f,s);
j:=0; c:=0;
for i:=1 to ord(s[0]) do begin
                         if s[i] in ['a'..'z','A'..'Z'] then j:=j+1
                         else if s[i-1] in ['a'..'z','A'..'Z'] then c:=c+1;
                         end;

j:=j div c;
writeln(g,j);
close(f);close(g);
end.