BEGIN {FS=","}

# First filename has to be corrected sorted file, where the first column is the key field
{
if (FILENAME==ARGV[1])
        {
        name[FNR] = substr($1,1,12)
        counter1 = FNR
        }
}

# Second filename is file to be sorted to match the first file
{
if (FILENAME==ARGV[2])
        {
        line[substr($1,1,12)] = $0
        counter2 = FNR
        }
}

END {   for(i=1;i<=counter1;i++)
                {
                print line[name[i]]

                }

}