#from packagex import prog1
#prog1.add(2,4)
#prog2.sub(2,4)

#from datacolections.common elements impoort elements multipilication

#using aliasing
#from packagex import prog1 as p
#p.add(2,4)
#p.sub(2,4)



#one function
#from packagex.prog1 import add
#add(3,7)


