One theater plans to present seven plays over seven weeks in the fall  They are F, G , J, K, O, R, S  There is one play a week, and each play runs exactly one week  The repertory must meet the following conditions :(1) G must be performed in the third week  (2) O and S cannot be performed continuously  (3) K must be staged before J and S
(4) F and J must be scheduled to perform in two consecutive weeks
The Chinese navy has not fully deployed transport ships and refueling vessels to support the carrier. The destroyers and submarines that guard the carrier are also vulnerable.