Vim Regex Capture Groups [bau -> byau : ceu -> cyeu]

Question

I have a list of words:

bau
ceu
diu
fou
gau

I want to turn that list into:

byau
cyeu
dyiu
fyou
gyau

I uns

Answer 1

You can also use this pattern which is shorter:

:%s/^./&y

• %s applies the pattern to the whole file.
• ^. matches the first character of the line.
• &y adds the y after the pattern.