From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: a

1

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: C

2

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: b

3

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: _

4

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: [foo] Fwd: [bar] Re: fw: b (fWd)  (fwd)

55

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: b (a)

66

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: Re: [FWD: c]

77

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: [xyz]

88

From user@domain  Fri Feb 22 23:00:00 2008 +0200

9

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: =?iso-8859-1?q?_?=

10

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: Re: =?utf-8?q?b?=

11
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From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: =?iso-8859-1?q?RE:_C?=

12
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From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: =?us-ascii?b?UmU6IGM=?=

13

The subject is 'Re: c'.
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From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: Ad: Re: Ad: Re: Ad: x

14

From user@domain  Fri Feb 22 23:00:00 2008 +0200
Subject: re: [fwd: [fwd: re: [fwd: babylon]]]

15