Welcome to CS 106X Word Ladder!
Give me two English words, and I will change the first
into the second by changing 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.