NumberFormatException

[biliboc]

I get an exception with this input string:

MD 0313
4 000T
Ordering provide

java.lang.NumberFormatException: For input string: "000T"
        at java.lang.NumberFormatException.forInputString(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at java.lang.Integer.parseInt(Unknown Source)
        at com.joestelmach.natty.WalkerState.seekToYear(WalkerState.java:143)
        at com.joestelmach.natty.generated.DateWalker.explicit_seek(DateWalker.java:1572)
        at com.joestelmach.natty.generated.DateWalker.relative_date(DateWalker.java:730)
        at com.joestelmach.natty.generated.DateWalker.date(DateWalker.java:651)
        at com.joestelmach.natty.generated.DateWalker.date_time(DateWalker.java:577)
        at com.joestelmach.natty.generated.DateWalker.date_time_alternative(DateWalker.java:524)
        at com.joestelmach.natty.generated.DateWalker.parse(DateWalker.java:410)
        at com.joestelmach.natty.Parser.singleParse(Parser.java:206)
        at com.joestelmach.natty.Parser.parse(Parser.java:118)