#iNTRODUCING DATA FROM PROMPT. EXTENDED
friendNames = []
while True:
print('Enter name of a friend ' + str(len(friendNames) + 1) +
' (Or enter F when finished.):')
name = input()
if name == 'F':
break
friendNames = friendNames + [name] # list concatenation
while True:
print ('Name a friend to check he is in the list')
print ('Type FFF to finish')
CHECK = input()
if (CHECK) in friendNames:
print ('Yes')
print()
elif (CHECK) == ('FFF'):
break
else:
print ('Nope, this name is not in the list')
print ()
print ('Do you want to see the complete list?')
YESNO = input()
if YESNO == ('yes'):
print('The friends names are:')
for name in friendNames:
print(name)
else:
print ('Let´s continue')