,A a,B b,A A A a a a B B B b b b,A A A a a a,(a a)ant,(a a)apple,(a a)alligator,Aa Aa Aa a a aapple,Aa Aa Aa a a a,ant,Aa Aa Aa a a a,alligator,bag cat satclap fan hanhat sack flag,B B B b b b,(b b)book,(b b)banana,(b b)bag,Bb Bb Bbb b bbook,Bb Bb Bbb b bbanana,Bb Bb Bbb b bbag,书写环节,
