Shell Programming and Scripting

$ echo 'Unix|300|17-01-2010' | awk '
{
    for(i=1;i<=length;i++){
         c=substr($0,i,1)
         d=substr($0,i,10)
         if(d~/^[0-9][0-9]-[0-9][0-9]-[0-9][0-9][0-9][0-9]$/) {
            printf "01-01-1999"
            i+=9
         }
         else
         if(c~/[0-9]/) {
            pn++
            if(pn>10) pn=1
            printf substr("1234567890", pn, 1)
         }
         else if(c~/[A-Z]/) {
            pl++
            if(pl>26) pl=1
            printf substr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", pl, 1)
         }
         else if(c~/[a-z]/) {
            pl++
            if(pl>26) pl=1
            printf substr("abcdefghijklmnopqrstuvwxyz", pl, 1)
         }
         else
            printf c
    }
    printf ORS
}'
Abcd|123|01-01-1999

abcdefghijklmnopqrstuvwxyz1234567890
374df2dmd94nflt934272840ndn2834m4827

cat infile | tr "[`sed -n 1p map`]" "[`sed -n 2p map`]"   > outfile