YEUTO='Tx'
TRAM='HATINH HUONGKHE KYANH TUONGDUONG TUYENHOA VINH'
rm ${YEUTO}_N1.dat
for yt in ${YEUTO} ; do
  cp ${yt}_DONGHOI.txt ${yt}_N1.dat
    for st in ${TRAM} ; do
    cat ${yt}_${st}.txt >> ${yt}_N1.dat 
    done
done 
