The last fully unique phase is phase 1, which basically undoes the work of phase 7. However, phases 2-5 will also need to turn the phase number into a index ranging from 0-3, so instead of comparing the value against 1 we decrement it and check if that made it zero:
Amazon's Bahrain data center targeted by Iran for support of U.S. military, state media says
，这一点在Line官方版本下载中也有详细论述
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