input: Please answer the following: On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "sexy app with a very cool desktop client! But pleeease work on the synchronisation. It happens alot that my friends don't receive messages until actually opening the app. On both android and iOS. Very annoying."
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output: 4

input: Please answer the following: On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "Nice app"
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output: 3

input: Please answer the following: On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "Did not work First app I tried failed."
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output: 1

input: Please answer the following: On a scale of 1-5 (with 1 being least favorable and 5 being most favorable), how would you rate this review? "Mohammed Ejaj"
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output:
5