I have a 2 files with the following: File1.txt A 1B 2C 5Z 3File2.txtA 4B 7 C 10D 11What I would like to do is create something like A 1 4 B 2 7C 5 10D - 11Z 3 -Is there a utility that does this? If not how Can this be done? Using a find and awk or something?   
Joining two files
text processing;join
join -a1 -a2 -o 0,1.2,2.2 -e - file1.txt file2.txt