BEGIN {

	# 1. Should print aCa

	IGNORECASE = 1

	FS = "[c]"

	IGNORECASE = 0

	$0 = "aCa"

	print $1

	# 2. Should print a

	IGNORECASE = 1

	FS = "[c]"

	$0 = "aCa"

	print $1

	# 3. Should print a

	IGNORECASE = 1

	FS = "C"

	IGNORECASE = 0

	$0 = "aCa"

	print $1

	# 4. Should print aCa

	IGNORECASE = 1

	FS = "c"

	$0 = "aCa"

	print $1

	# 5. Should print aCa

	FS = "xy"

	IGNORECASE = 0

	FS = "c"

	IGNORECASE = 1

	$0 = "aCa"

	print $1

	# 6. Should print aCa

	FS = "xy"

	IGNORECASE = 0

	FS = "c"

	IGNORECASE = 1

	split("aCa",a)

	print a[1]

}