interlockUSESsets

#Two words "interlock" if taking alternating letters from each forms a new word.
# For example, "shoe" and "cold" interlock to form "schooled."

wordlist = []
wordset = set([])
interlockedwords =[]

def interlock(word1,word2):
    interlocked=""
    for i in range(len(word1)):
        interlocked+=(word1[i])
        try:
            interlocked+=(word2[i])
        except:
            break
    return interlocked

#Loads file into memory
with open('10000words') as f:
    for line in f:
        line = line.strip()
        wordlist.append(line)
        wordset.add(line)

#Sets up word interlocks
wordlist_length=len(wordlist)
print(wordlist_length)
countup = 1

for word1 in wordlist:
    print(countup)
    for j in range(countup,wordlist_length):
        word_to_check=interlock(word1,wordlist[j])
        if word_to_check in wordset:
            add_word =(word1,wordlist[j],word_to_check)
            interlockedwords.append(add_word)
            print(add_word)
    countup+=1