I'll write these words in letters across the sky? It's written in the letter, still in the air, Or is it written in the air?

I'll write these words in letters across the sky? It's written in the letter, still in the air, Or is it written in the air?

This is a poetic language. Look at the context
I will write these words in a letter and send them to you across the sky

look up the words and put them in the alphabetical order

Find the words and sort them in alphabetical order

At these words and with them
___ these words,Mike knew that this must be the man who had robbed the woman of her money.
What's the difference between at and with?

At the words is equivalent to on hearing the words
At the news she broke into tears
With the words of goodwill, she left without turning her head again,
So this sentence is not suitable for with