program radu;
var s:string;
    cuv,lung:longint;
    x:char;
    f,g:text;
begin
     assign (f,'text.in');
     reset (f);
     assign (g,'text.out');
     rewrite (g);
     cuv:=0;
     lung:=0;
     while not eof(f) do
           begin
                read (f,x);
                if ((x>='A') and (x<='Z')) or ((x>='a')and (x<='z')) then inc(lung);
           end;
     reset (f);
     while not eof(f) do
           begin
                read (f,x);
                if ((x>='A') and (x<='Z')) or ((x>='a')and (x<='z')) then write (g,x)
                                                                     else writeln (g,' ');
           end;
     reset (g);
     while not eof (g) do
           begin
                read (g,x);
                if x<>' ' then inc(cuv);
                readln(g);
           end;
     rewrite (g);
     write (g,lung div cuv);
     close (f);
     close (g);
end.