Political rivals in Afghanistan have issued separate invitations for inauguration ceremonies on Monday.Abdullah Abdullah, rival of Afghanistan's president-elect Ashraf Ghani, issued invitations to a parallel swearing-in ceremony due next week, his spokesman said on Saturday.We've sent the invitation to all national and international organisations and all necessary preparations have been taken," Fraidoon Khwazoon, Abdullah's spokesman said, referring to invitations to an inauguration ceremony due to take place in Kabul on Monday morning at a similar time to Ghani's