GSM Module sim 900a receiving the sms content and storing it in an array.

so i am using a gsm module sim 900a by ic station and the thing i need to accomplish is that when my gsm receive's a text message, it directly reads and stores the SMS content in an array. e.g. if it receive's a text message "ss 120" the thing a need to do is to first of all verify the code "ss" and then store the "120" in an variable. could somebody help me out how to do this. i have been trying to solve this for a long time. and i need help urgently. Thanks in advance.

How many more places do you intend to post this? Cross posting pisses people off, by wasting their time answering in one thread what someone else has already addressed in another thread.