For remote viewing to be remote viewing and to separate it from other psychic means it needs to have these things in place - if not its NOT remote viewing:
1. it all needs to be planned project - nothing spontaneous.
2. There has to be an identified target.
3. the remote viewer has to be blind (not know anything specific about the target) why we hide it behind random numbers. No one who knows the target is allowed in the vicinity or in contact with the remote viewer.
4. There has to be feedback - to gauge the accuracy of the psychic data.
if any or more than one of these is missing is classical psi and not remote viewing

Numbers and letters can be done - i have done them myself but for example the lottery here in the Uk which is 7 double digit numbers thats 14 digits - hard to get and all in the right order/configuration.
daz