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With an increasing number of people saved in the phone book, you do not contact every single person necessarily. This
causes someone not being in contact for many months or longer.
There are people who havent contacted with you for a long time over three months, half year, and a year.
This program helps to manage a personal relationship with a large number of people saved in your phone book.
seoul, South Korea
Young Dong, Lee
Seon Ho, Kim
Incheon, South Korea
Li Ming,Hsing Hyo-Geun, Kim