question about adding

first of all sorry i dont know where to post this question but i need to ask this.
how can i add or combine this things.
ex. i got this nos.

123465
321654
789465

then i want to add (username) on the front of this nos.
like this

username123456
username321654
username789465

without copy and pasting the username. how can i automate this? i must create thousands of this.

what application should i use?

thanks

Use Excel, one of the best programs out there.

Put all your data in Column A and Column B. Then in Column C put =A1&B1 copy that to all the C cells.

mods you can close this thread now.. i love BHW thanks