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]
}