Strings in Strings by teebee

import java.util.*;enum S{_;System z;{for(Scanner r=new Scanner(z.in);r==r;)z.out.println(r.nextLine().matches(".*(\\S*) (?!\\S*\\1).*")?"NO":"YES");}}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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