URLs

• https://www.pixiv.net/users/1769783
• https://www.pixiv.net/stacc/u-si
• https://twitter.com/U_S_I
• https://twitter.com/intent/user?user_id=742630145106841600
• http://twitpic.com/photos/u_s_i
• http://yfrog.com/user/u_s_i/photos