Not sure how many rows of data you have so this might not work too well but assuming that all your data is in a single column (with characters/digits separated by a space), then the first thing you should get friendly with notepad and the find/replace function:
1) Copy data into notepad
2) Run find/replace to swap spaces with tabs
3) Paste the data back into Excel as columns
4) Copy data from columns B and C, and append it to column A