var
a, c: string;
i, b: byte;
begin
readln(a);
for i := 1 to length(a) do
begin
if not(a[i] in [' ', '!', ',', '.', ';']) then
c := c + a[i];
if (a[i] in [' ', '!', ',', '.', ';']) or (i = length(a)) then
begin
if c <> '' then
if length(c) = 4 then
inc(b);
c := ''
end;
end;
write('V tekste ', b, ' slov s 4 simvolami!');
readln
end.