alias	s	step
alias	g	goto
alias	f	finish
alias	r	retry
alias	v	vars
alias	p	print
alias	P	print *
alias	d	stack
alias	c	continue
alias	b	break
alias	h	help
alias	?	help
alias	excp	exception
alias	e	exception
alias	EMPTY	step
alias	NUMBER	step
