Copy and pasting blocks of text anywhere

Question

I have two blocks of text and I want to merge them. However, the problem is that the blocks are not synchronous and I want to place one in front of the other completely. For example, suppose we have the following block of text:

aaaaaaaa
aaaaaaaa
aaaaaaaa
aaaaaaaa
aaaaaaaa

and the following block:

bbbbbbbb
bbbbbbbb
bbbbbbbb
bbbbbbbb

And I want to merge them thus:

aaaaaaaabbbbbbbb
aaaaaaaabbbbbbbb
aaaaaaaabbbbbbbb
aaaaaaaabbbbbbbb

I can't copy line by line because there are many lines in both files and they could be different.

Answer 1

Select all 'bbbb..' text using Ctrl-V (visual block selection mode), yank; then go to the last char of the first aaaa... string, hit Ctrl-V again; go down to the last aaaa ... string, while staying in the same column (so cursor is still on the last a character). You are still in block selection mode. Hit 'p' to paste.

Answer 2

Visual-block select (C-V) the text you want to prepend, then either yank/delete the text. Go to the first line and character of the text you want to prepend to, then press P (upper case P).