Re: upper/lower case

 

 sed -e '
 h
 

 s/;/\
 /3
 s/;/\
 /2
 s/.*\n\(.*\)\n.*/\1/
 

 y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
 

 s/\<\([a-z]\)/\
 \1/g
 

 s/$/\
 \
 /
 bxform
 

 :a
 s/\n\(a\)\(.*\)\(\n.*\n\1\)\(A\)\(.*\)/\4\2\3\4\5/;ta
 s/\n\(.\)\(.*\)\(\n\n.*\n\1\)\(.\)\(.*\)/\4\2\3\4\5/;ta
 

 x;G;s/\n\n.*//
 s/;/\
 /3
 s/;/\
 /2
 s/\n\(.*\)\n\(.*\)\n\(.*\)/;\3;\2/;b
 

 :xform
    s/.$/&/
       s//&aA&/
       s//&bB&/
       s//&cC&/
       s//&dD&/
       s//&eE&/
       s//&fF&/
       s//&gG&/
       s//&hH&/
       s//&iI&/
       s//&jJ&/
       s//&kK&/
       s//&lL&/
       s//&mM&/
       s//&nN&/
       s//&oO&/
       s//&pP&/
       s//&qQ&/
       s//&rR&/
       s//&sS&/
       s//&tT&/
       s//&uU&/
       s//&vV&/
       s//&wW&/
       s//&xX&/
       s//&yY&/
       s//&zZ&/
    s///
 ba
 '  yourfile
 



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