A steamship company is famous for the unfailing punctuality of its sailings. Every day at noon, Greenwich time, one of its liners leaves Southampton for New York and exactly at the same hour, also Greenwich time, another boat sails from New York to Southampton. The crossing, in either direction, takes seven days. Thus, whenever a ship departs either form New York or from Southampton, another ship its just docking there, having arrived from the other direction. The eastbound and westbound liners ply the same course.
If you board such a vessel at Southampton, how many ships from the company do you meet during your voyage to New York?
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