Sounds to me, based on this and your other posts, that you are trying to create an app to automatically create Yahoo accounts and then cover your tracks. It also seems to me that the only reason to automate this is because you want to do it repeatedly. Call me cynical but I can't see any legitimate reason to want to do this.
Reverend Jim you are toooo cynical
it was meant for personal purpose , to find wanted id before sign up for a new account.
Reverend Reverend Jim
now if you had to make any new account from that list
the pro would find avail account that way you dont have to personaly try and find availability
and for your informatiom you cant automatically create Yahoo accounts , as new account need phone verification.
that mean 1 number per new account.
and what to cover up track for , is it a crime to find Availability or mak new account.