Create a solution that accepts an input identifying the name of a text file, for example, "WordTextFile1.txt". Each text file contains three rows with one word per row. Using the open() function and write() and read() methods, interact with the input text file to write a new sentence string composed of the three existing words to the end of the file contents on a new line. Output the new file contents.

The solution output should be in the format

word1 word2 word3 sentence 

Sample Input/Output:

If the input is

WordTextFile1.txt 

then the expected output is

cat chases dog cat chases dog