'''
Purpose: introduce the if-elif-else construct
'''

# prompt for one or two words and get the response
reply = input( 'Enter one or two words: ' )

# turn response into a list
list  = reply.split()

# get the length of the list
n = len( list )

# what are the possibilities for the user response
#   enters no words
#   enters one word
#   enters two words
#   enters more than two words (i.e., it is not of the prior cases)
# output whether they followed directions

response = ''  # none so far 

if ( n == 0 ) :
    # they did not follow directions -- no words were supplied`
    response = 'You did not enter any words'

elif ( n == 1 ) :
    # they did follow directions by entering one word
    response = 'Thanks for following directions by entering one word'

elif ( n == 2 ) :
    # they did follow directions by entering two words
    response = 'Thanks for following directions by entering two words'

else :
    # they did not follow directions -- too many words supplied`
    response = 'You entered too many words'

print( response) 

# all done