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Replace alphabets from certain positions

 
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# 1  
Old 06-25-2013
Replace alphabets from certain positions
Hi all, I have column 2 full of values like HIVE4A-56 and HIVE4-56. I want to convert all values like HIVE4A-56 to HIVE4-56.

So basically I want to delete all single alphabets before the '-' which is always preceded by a number. Values already in the desired format should remain unchanged (line 3 in example).

Code:
Input

1 HIVE4A-56 5 
2 HIVE57B-55 7
3 HIVE57-55 7

Output 

1 HIVE4-56 5
2 HIVE57-55 7
3 HIVE57-55 7

please help
# 2  
Old 06-25-2013
Code:
sed 's/[A-Z]-/-/' file

This User Gave Thanks to balajesuri For This Post:
ames1983
# 3  
Old 06-25-2013
Code:
sed 's/[A-Z]-/-/g' input.txt

This User Gave Thanks to PikK45 For This Post:
ames1983
# 4  
Old 06-25-2013
Thank you, how do I do it for 2nd column only?
# 5  
Old 06-25-2013
Code:
awk '{sub(/[A-Z]-/, "-", $2)}'1 file

 
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