Split variable Update

Hello every community friends, I have a question and I can not solve it by myself.
First, I scraped a variable such as: %E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE(2)
But I only want use the 314.
How can I split the variable part by part and selet the 312 which I realy need .
Thank you for your help.

You can use string1.substring(string1.index("/")+1),3))

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