Не пойму чего он "A" так тянет в начале каждого предложения или там вообще не "A", a "I'm" ????

happy girl
happy boy
happy son
happy friend

All living in a happy world
All living in a lonely world

happy life
happy love
happy mind
happy soul

We are living in a happy world
We are living in a lonely world

happy girl
happy boy
happy son
happy friend

All living in a happy world
All living in a lonely world

happy life
happy love
happy mind
happy soul

We are living in a happy world
We are living in a lonely world