Simplyfy

[nilamo]

Itertools is cool to get every combination, or you can also just iterate over the list.

word = "abcde"
twoletter = []
for left in word:
    for right in word:
        if left != right:
            twoletter.append(left + right)
print(twoletter)
# ['ab', 'ac', 'ad', 'ae', 'ba', 'bc', 'bd', 'be', 'ca', 'cb', 'cd', 'ce', 'da', 'db', 'dc', 'de', 'ea', 'eb', 'ec', 'ed']