I want to merge these two files into one. The desired result from the above would be:
Blueberry blue 14 tasty 12 78
Raspberry red 12 - - -
Blackberry dark 4 sour 4 3
Strawberry - - yummy 33 88
So the three columns of file1.txt and the four columns of file2.txt should result in a new file with six columns where all berries present in these two files only are represented with one row each. If a berry is not present in one of the two files, the corresponding entries from that file are replaced with a dash (like for Strawberry and Raspberry above).