base = 0
shailist = 
while base == 0 :
choice = raw_input("please enter your choice\n"
"1 - add text to list\n"
"2- remove text from list\n"
"3 - print the list \n"
"4 - exit"
)
if choice == str("1"):
addtext = raw_input("enter text ")
shailist.append(str(addtext))
elif choice == str("2"):
remtext = raw_input("enter text ")
shailist.remove(remtext)
elif choice == str("3"):
print shailist
elif choice == str("4"):
print "BYE"
break
else:
print("your choice is invalid \n")