how to get 10th grouping value in sed?

Question

It is my sed.

sed 's/\([a-z]\)\([A-Z]\)\([0-9]\)\([a-z]\)\([A-Z]\)\([0-9]\)\([a-z]\)\([A-Z]\)\([0-9]\)\([a-z]\)/\10/g'

I tried to get 10th grouping value.But,It gives first grouping value with 0(zero).

How to get 10th grouping value?

whether it is possible to get the 10th grouping value?

Answer 1

sed only supports 10 groups(from \0 to \9), and doesn't support non-captured group.

You can rewrite you command as:

sed 's/[a-z][A-Z][0-9][a-z][A-Z][0-9][a-z][A-Z][0-9]\([a-z]\)/\1/g'