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): metal Word 2 (or Enter to quit): azure No word ladder found from azure back to metal. Word 1 (or Enter to quit): kwyjibo Word 2 (or Enter to quit): fluxbar The two words must be found in the dictionary. Word 1 (or Enter to quit): car Word 2 (or Enter to quit): banana The two words must be the same length. Word 1 (or Enter to quit): monkey Word 2 (or Enter to quit): monkey The two words must be different. Word 1 (or Enter to quit): partial Word 2 (or Enter to quit): Have a nice day.