把以下3个文本合并成一个文本，并按字母顺序排序，然后输出新文本：
1. hello world
2. this is a test
3. what a beautiful day


1. hello world
2. this is a test
3. what a beautiful day
aabeaaabbcddeehhiiillllooorsssttttwy
beautiful day hello world this is a test what a