#input,s,a,,,,List of input files to be joined
list1,s,a,,,,List of input files to be joined
list2,s,a,,,,List of input files to be joined
output,f,h,"STDOUT",,,Output file
delim,s,h," ",,,Delimiter between file lines
missing,s,h,"Missing",,,Marker for missing lines
maxchars,i,h,161,,,Maximum number of output characters per line
shortest,b,h,yes,,,Quit at end of shortest file?
verbose,b,h,yes,,,Print verbose warnings?