after damage caused by Hurricane Sandy rendered normal S shuttle and train services in the area inoperable. This temporary H service lasted until May 2013, when full service on both routes to the Rockaways was restored. I has never been used due to its visual similarity to the number 1. K was last used as an Eighth Avenue Line local train, which was discontinued in 1988. Prior to that it was used for a 6th Avenue Line local service via the Chrystie Street Connection. O has never been used due to its visual similarity to the number 0. P was planned for the service operating on the final leg of the BMT Culver Line before it was downgraded to a shuttle. Later, the P was proposed again as a nonstop between Sutphin Boulevard–Archer Ave (at the LIRR's Jamaica station) and 34th Street–Penn Station, continuing locally to 168th Street, via the BMT Archer Avenue Line, BMT Jamaica Line, Chrystie Street Connection, IND Sixth Avenue Line and IND Eighth Avenue Line (switching to the latter at West Fourth Street) in the 1990s. This would have been used during a threatened Amtrak strike that would have prevented LIRR trains from entering Penn Station. The letter has never actually been used, as it sounds like the word "pea" or the slang term "pee" (a colloquialism for urine). was used for BMT West End Line services, but was quickly replaced by the expanded service after routes were reorganized following the opening of the Chrystie Street Connection. T is the planned label for the full-length Second Avenue Subway service. U has never been used, as it sounds like the word "you". was introduced in December 2001 for weekday local service on the IND Queens Boulevard Line and IND Sixth Avenue Line via 53rd Street, after the train was shifted to the newly opened IND 63rd Street Line. V service was discontinued in June 2010 due to budgetary concerns, being replaced entirely (except for service to the Second Avenue station) by a rerouted train. X is used as a placeholder for routes under development. Y has never been used, as it sounds like the word "why". The JFK Expresss bullet, featuring an airplane symbol inside a turquoise circle, was used from 1978 until 1990. Prior to May 1985, the B Division used two-letter combinations to indicate differing variations of similar services, but these were phased out in