#!/bin/bash
s="‘Awaara’
don’t
don't'"
sed -E -e "s/([[:alpha:]]['’][[:alpha:]])|['‘’]/\\1/g" -e 's/[][()>?,;.!:]|′|…/ /g' <<< "$s" | tr ' ' '\n' | sort -u | tr 'a-z' 'A-Z'
IyEvYmluL2Jhc2gKcz0i4oCYQXdhYXJh4oCZCmRvbuKAmXQKZG9uJ3QnIgpzZWQgLUUgLWUgInMvKFtbOmFscGhhOl1dWyfigJldW1s6YWxwaGE6XV0pfFsn4oCY4oCZXS9cXDEvZyIgLWUgJ3MvW11bKCk+Pyw7LiE6XXzigLJ84oCmLyAvZycgPDw8ICIkcyIgfCB0ciAnICcgJ1xuJyB8IHNvcnQgLXUgfCB0ciAnYS16JyAnQS1aJw==