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): Work
Word 2 (or Enter to quit): Play
A ladder from play back to work:
play pray bray brak boak bork work 

Word 1 (or Enter to quit): Sleep
Word 2 (or Enter to quit): aWAKe
A ladder from awake back to sleep:
awake aware sware stare starn stern steen steep sleep 

Word 1 (or Enter to quit): jealous
Word 2 (or Enter to quit): ZEALOUS
A ladder from zealous back to jealous:
zealous jealous 

Word 1 (or Enter to quit): ANGEL
Word 2 (or Enter to quit): devil
A ladder from devil back to angel:
devil devel level lever leger luger auger anger angel 

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