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The lane configuration with lane volumes in vehicles per hour of a four-arm signalized intersection is shown in the figure. There are only two phases: the first phase is for East-West and the West-East through movements,  and the second phase is for the North-South and the South-North through movements. There are no turning movements. Assume that the saturation flow is $1800$ vehicles per hour per lane for each lane and the total lost time for the first and the second phases together is $9 \; \text{seconds.}$    

The optimum cycle length (in $\text{seconds}$), as per the Webster’s method, is ____________.(rounds off to the nearest integer) 

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