Summarize the sed script

Shell Programming and Scripting
1

Hi folks,
I have a situation where i have a raw file like

cat file_raw

776 713 111
0776713113
317-713-114
235776713115
776713116
336713117
77 6 713 118
0776713119
235776713120

and would like to replace all leading zeros with 235, remove all spaces and dashes, and make all lines start with 235.

I have used the script below and works fine but would like to summarise it.

 
sed 's/^0//' file_raw > file_space
sed 's/ //g' file_space > file_lead7
sed 's/^7/2567/' file_lead7 > file_lead3
sed 's/^3/2563/' file_lead3 > file_dash
sed 's/-//g' file_dash > file_last

Expected output is
cat file_last

235776713111
235776713113
235317713114
235776713115
235776713116
235336713117
235776713118
235776713119
235776713120

2

One way with awk:

awk '!/^235/{
  gsub("[ |-]","")
  sub("^0", "")
  $0="235"$0
}
{print}' file
3 
perl -ne  '{s/^0*(?!235)/235/;s/[- ]//g;print;}'
4

Thanx guys,
Preferred the perl one.