1	a
   2	b
   3	c
   3	d
   1	e
   3	f
   3	g
   2	h
   1	i
   1	ij
   2	j
   3	k
   3	l
   3	m
   3	n
   1	o
   3	p
   3	r
   3	s
   3	t
   1	u
   2	v
   2	w
   2	z