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tokens: We thank the anonymous referee for the fruitful comments. We also would like to thank R. Yamazaki, Y. Ohira, and J. Shimoda for their fruitful discussion. This work is supported in part by Grant-in-Aid for Scientific Research of the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan, No. 22684012 and 15K05107 (AB), 15K17657 (MS), and 16K17673 (SK). Facility: Suzaku .