Shell Programming and Scripting

Hi there,
I have a file where the records are like :

Delta/7248/S-T-TF-/O-D-DO-
Virgin/657/SM-W-FS/DO-O-DO
Lufthansa/105/SMTW-FS/OODO-DO
Virgin/212/---WT-S/---OO-D
PanAm/411/SM-W-FS/OD-O-DD

The first field is the company name, the second the flight number, the third the days (S-Sunday, M-Monday etc) and in the last field if the flight arrived Ontime (O) or there was a delay (D).

What I want is to get for each company, not for each flight, the total of the flights that arrived on time and with delay. I am imagining the output sth like:

Virgin Flights on time: 17 Delayed: 22
Lufthansa Flights on time: 12 Delayed: 13

Can somebody help please. Actually I have sth in mind but I don't know how to count each O and D.

nawk -f airlines.awk myFile.txt

here's airline.awk:

Code:

BEGIN {
  FS="/"
}

{
  airlineO[$1] += gsub("O", "", $NF)
  airlineD[$1] += gsub("D", "", $NF)
}

END {
  for ( i in airlineO)
    printf("%s Flights on time: %d Delayed: %d\n", i, airlineO[i], airlineD[i])
}