Dear monks, I want to chop the beginning and end of lines in 2 files based on a condition. 
file1.txt contains
>sample1
ACTACTAGCTC
>sample2
CGATCGAACC
>sample3
CGTTGAACTGAA

file2.txt contains
>sample1
1 4 23 43 65 67 17 15 1 3 2
>sample2
23 43 65 12 34 54 76 2 9 12
>sample3
32 12 43 54 26 47 58 11 8 6 9 9

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The condition to be checked is in the file2.txt, for each sample, if a continous stretch of numbers at the end or beginning is less than 10, only those numbers should be chopped off (the alphabets in the same position in other file(file1.txt) should also be removed). results to be written in a new file. Thank you.

In reply to chopping the beginning and end of lines in 2 files by heidi

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