var f,g:text;
    p,c:char;
    t,nrm,nrc,r:longint;
begin
assign(f,'text.in');reset(f);
assign(g,'text.out');rewrite(g);
nrm:=0;
nrc:=0;
read(f,p);
if p in ['A'..'Z','a'..'z'] then
        begin
        nrm:=1;
        nrc:=1;
        end;
while not eof(f) do
      begin
      read(f,c);
      if(c in ['A'..'Z','a'..'z']) and not (p in ['A'..'Z','a'..'z']) then nrc:=nrc+1;
      if c in ['A'..'Z','a'..'z'] then nrm:=nrm+1;
      p:=c;
      end;
r:=nrm div nrc;
writeln(g,r);
close(f);
close(g);
end.