I have file which looks like this

ISA*00* *00* *ZZ*245391167 *ZZ*645529160 *040107*134
9*U*00200*213356538*0*P*>^M
GS*HN*245391167*645529160*20040107*1349*356539*X*0
03050^M
NM1*QC*1*WEST*TARSHA****MR*501633110^M
TRN*1*T2200401070000081P000000^M
STC*PR001***000000012000^M
REF*EJ*001515009206^M
REF*1K*200020030200400773057088*000000000000000000
000000 SPLIT^M
DTP*150*D8*20031013^M
STC*PR001^M
REF*55*01^M
SE*17*356539001^M
GE*1*356539^M
IEA*1*213356538^M

i want to take out the name without any astriks which in NM1 line

take out PR001 from STC line

and take out numbers after EJ on first REF line

can some one help me?