The use of single digit constants is a bit strange. Why kot take the approach of dc and let constant tokens be any string of digits, separated either by a diffe

The use of single digit constants is a bit strange. Why kot take the approach of dc and let constant tokens be any string of digits, separated either by a different token or whitespace? Or the rather simpler approach of forth where all tokens are separated by whitespace. I also have to echo shat someone else mentioned: give Forth Haiku a try!