In the following case How to change the code.

{{This is a}
First {\alpha}
curly {[$\beta$]}
bracket}
{{This is a}
First {\alpha}
curly {[$\beta$]}
bracket}
sample string:
{This is a
First
curly
bracket}
I want only numbers from above string and save these three numbers to three different variable[xshift={\hzwidth+10} ,yshift={-\vtheight+15}, rotate=30]