I have below string
" \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t548843\t\t\t\t\n\t\t\t\tProcess Vendor Invoice\n\t\t\t\tWI3\n\t\t\t\tOpen\n\t\t\t\t2018-12-20\n\t\t\t"
and i want output string = 548843
How can I achieve this?