Welcome to CS 106B/X Word Ladder!
Please give me two English words, and I will convert the
first into the second by modifying one letter at a time.

Dictionary file name: dictionary.txt

Word 1 (or Enter to quit): code
Word 2 (or Enter to quit): data
A ladder from data back to code:
data date cate cade code 

Word 1 (or Enter to quit): 
Have a nice day.
