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how to insert space in alphanumeric string

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# 1  
Old 06-07-2012
how to insert space in alphanumeric string
Hi everyone,

I want help to insert space between digits and letters in a alphanumeric string.

INPUT
Code:
TRY234TER
PHY1TYR

EXPECTED OUTPUT
Code:
TRY 234 TER
PHY 1 TYR

The lines always begin with the letters and the alphabets will be a three letter combination before and after the number. The number can either be a one digit, two, three or four digit. I want to have a space between letters and digits as shown in the expected output.
Last edited by Franklin52; 06-07-2012 at 04:00 AM.. Reason: Please use code tags
# 2  
Old 06-07-2012
Code:
sed 's/[0-9]\{1,4\}/ & /' inputfile

# 3  
Old 06-07-2012
Perl
Code:
 perl -pe 's/^(\D{3})(\d+)/$1 $2 /g' file.txt

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