awk '{ if ($4 >= 1 && $4 <= 10) print $1 }' sample.txt
awk '$4 ~ /^[1-9]$|^10$/{print $1}' sample.txt
output:
sample1sample2
explanation:
^[1-9]$
|
^10$
awk -F ':' '$4 >= 1 && $4 <= 10{print $1}'