Simplify the following text for a Grade 9 native English-speaking person.
Original: During the first months after Biya 's succession , he continued to show loyalty to Ahidjo , and Ahidjo continued to show support for Biya , but in 1983 a deep rift developed between the two .
Simplified: When President Ahidjo resigned on November 6 , 1982 , Biya became president of the country . Shortly afterwards , Ahidjo and Biya began feuding , and Ahidjo was forced to leave Cameroon .