i want to rename this files

#ANTB.BHZ.KO
#ANTB.BHE.KO
#ANTB.BHN.KO

They have to be like this

#2010-10031749_ANTB.BHZ
#2010-10031749_ANTB.BHE
#2010-10031749_ANTB.BHN

plz help me!