LC_CTYPE=C
LC_COLLATE=C
LC_TIME=C
LC_NUMERIC=C
LC_MONETARY=C
LC_MESSAGES=C
LANG=C

export LC_CTYPE LC_COLLATE LC_TIME LC_NUMERIC LC_MONETARY LC_MESSAGES LANG

BGDTD=$1
ENDTD=$2

BGTMP=`mktemp`
ENTMP=`mktemp`

cat $BGDTD |\
dos2unix |\
sed '/^$/d' |\
sed 's/=/|/' |\
sort -t '|' -k 1,1 > $BGTMP

cat $ENDTD |\
dos2unix |\
sed '/^$/d' |\
sed 's/=/|/' |\
nl |\
sed 's/^[\t ]*\([0-9][0-9]*\)[\t ]*\(.*\)$/\2|\1/' |\
sort -t '|' -k 1,1 > $ENTMP

RESTMP=`mktemp`

join $ENTMP $BGTMP  -t '|' -o 1.3,1.1,1.2,2.2 > $RESTMP
join $ENTMP $BGTMP  -t '|' -o 1.3,1.1,1.2,2.2 -v 1 >> $RESTMP

cat $RESTMP |\
sort -t '|' -k 1,1 -n |\
sed 's/\([^|]*\)|$/\1|\1/' |\
cut -d '|' -f 2,4 |\
sed 's/|/=/'

rm $BGTMP $ENTMP $RESTMP