Chennai EMU - என்னோட உயிர் டா நீ

Seems B3 also permanent. In coach also its written as b3 only.
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2014-02-22, Sat WL# 22 GNWL131 / WL10 GNWL# 44 / WL# 3 0m old Refresh
2014-02-23, Sun GNWL# 22 / WL# 8 GNWL110 / WL8 GNWL# 35 / RAC6 0m old Refresh
2014-02-25,...
more...

Tue GNWL# 3 / RAC75 GNWL / Avbl GNWL# / Avbl 0m old Refresh
2014-02-26, Wed Avbl 84 GNWL / Avbl GNWL# / Avbl 0m old Refresh
2014-02-27, Thu Avbl 106 GNWL / Avbl GNWL# / Avbl 0m old Refresh
2014-03-01, Sat RAC17 / RAC 17 GNWL / Avbl GNWL# / Avbl