cat my_file | while read line
do
last=`echo $line | cut -c 3-`
echo "$last"
done

my_file:
1US8738297897918[space][space][space]0[space][space]0[space][space]0
1US8738297897918[space][space][space]0[space][space]0[space][space]0
1US8738297897918[space][space][space]0[space][space]0[space][space]0

Expected output:
8738297897918[space][space][space]0[space][space]0[space][space]0
8738297897918[space][space][space]0[space][space]0[space][space]0
8738297897918[space][space][space]0[space][space]0[space][space]0

Current Output:
8738297897918[space]0[space]0[space]0
8738297897918[space]0[space]0[space]0
8738297897918[space]0[space]0[space]0

Plz Help !