-# cut -b 2-
-# convert_sn() {
-# local sn a b c d
-# sn="$1"
-# if [ -z "$sn" ] ; then read sn; fi
-# a="${sn%??????????????????????????}"; sn="${sn#??????}"
-# b="${sn%????????????????????}"; sn="${sn#??????}"
-# c="${sn%??????????????}"; sn="${sn#??????}"
-# d="$sn"