OpenFile = open("source.txt","r")
lines = OpenFile.readlines()
CreateFile = open("target.txt","w")
for i in lines:
??? Ri = i[::-1]
??? if lines.index(i) == -1:
??????? break
??? Ri = Ri.strip()
??? Ri = Ri+"\n"
??? CreateFile.write(Ri)
OpenFile.close()
CreateFile.close()