ab:
	a b
	ab

abc:
	a b c
	ab c
	a bc
	ac b
	abc

abcd:
	a b c d
	a bcd
	b acd
	c abd
	d abc
	ab cd
	ac bd
	ad bd
	a b cd
	a c bd
	a d bd
	b c ad
	b d ac
	c d ab
	abcd

abcde:
	a b c d e
	a bcde
	b acde
	c abde
	d abce
	e abcd
	a b cde
	a c bde
	a d bce
	a e bcd
	b c ade
	b d ace
	b e acd
	c d abe
	c e abd
	d e abc
	a b c de
	a b d ce
	a b e cd
	a c d be
	a c e bd
	a d e bc

	abcde