Checking if a word chain is correct
A few remarks:


You can do the .lower() one time by using woord = input().lower()
You could check if they are in alphabetic order by keeping track of the    previous one like this:

previouschar=''
for s in ('aaa', 'bbb', 'ddd', 'efe', 'geg'):
    if previouschar != '' and ord(s[0]) != ord(previouschar) + 1:
        print('Out of order')
    previouschar = s[0]