0mg · May 8, 2011 13:16
diff --git a/gistfile1.txt b/gistfile1.txt
 123 456 78#
 456 78# 123
 78# 123 456

 312 564 8#7 <-+
 564 8#7 312   | exchangeable
 8#7 312 564 <-+

 231 645 #78
 645 #78 231
 #78 231 645
 ^ ^
 | |
 +-+
 exchangeable
	123 456 78#
	456 78# 123
	78# 123 456

	312 564 8#7 <-+
	564 8#7 312 \| exchangeable
	8#7 312 564 <-+

	231 645 #78
	645 #78 231
	#78 231 645
	^ ^
	\| \|
	+-+
	exchangeable