Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Code | District | Headquarters | Population (2011) | Area (km²) | Density (/km²) | Official website |
| --- | --- | --- | --- | --- | --- | --- |
| AD | Adilabad | Adilabad | 2737738.0 | 16105.0 | 170.0 | http://adilabad.nic.in/ |
| AN | Anantapur | Anantapur | 4083315.0 | 19130.0 | 213.0 | http://anantapur.nic.in/ |
| CH | Chittoor | Chittoor | 4170468.0 | 15152.0 | 275.0 | http://chittoor.nic.in/ |
| EG | East Godavari | Kakinada | 5151549.0 | 10807.0 | 477.0 | http://eastgodavari.nic.in/ |
| GU | Guntur | Guntur | 4889230.0 | 11391.0 | 429.0 | http://guntur.nic.in/ |
| HY | Hyderabad | Hyderabad | 4010238.0 | 217.0 | 217.0 | http://hyderabad.nic.in/ |
| CU | Cuddapah | Cuddapah | 2884524.0 | 15359.0 | 188.0 | http://kadapa.nic.in/ |
| KA | Karimnagar | Karimnagar | 3811738.0 | 11823.0 | 322.0 | http://karimnagar.nic.in/ |
| KH | Khammam | Khammam | 2798214.0 | 16029.0 | 175.0 | http://khammam.nic.in/ |
| KR | Krishna | Machilipatnam | 4529009.0 | 8727.0 | 519.0 | http://krishna.nic.in/ |
| KU | Kurnool | Kurnool | 4046601.0 | 17658.0 | 229.0 | http://kurnool.nic.in/ |
| MA | Mahbubnagar | Mahabubnagar | 4042191.0 | 18432.0 | 219.0 | http://mahabubnagar.nic.in/ |
| ME | Medak | Sangareddi | 3031877.0 | 9699.0 | 313.0 | http://medak.nic.in/ |
| NA | Nalgonda | Nalgonda | 3483648.0 | 14240.0 | 245.0 | http://nalgonda.nic.in/ |
| NE | Nellore | Nellore | 2966082.0 | 13076.0 | 227.0 | http://nellore.nic.in/ |
| NI | Nizamabad | Nizamabad | 2552073.0 | 7956.0 | 321.0 | http://nizamabad.nic.in/ |
| PR | Prakasam | Ongole | 3392764.0 | 17626.0 | 193.0 | http://prakasam.nic.in/ |
| RA | Rangareddy | Hyderabad | 5296396.0 | 7493.0 | 707.0 | http://rangareddy.nic.in/ |
| SR | Srikakulam | Srikakulam | 2699471.0 | 5837.0 | 462.0 | http://srikakulam.nic.in/ |
| VS | Vishakhapatnam | Vishakhapatnam | 4288113.0 | 11161.0 | 340.0 | http://visakhapatnam.nic.in/ |
| VZ | Vizianagaram | Vizianagaram | 2342868.0 | 6539.0 | 384.0 | http://vizianagaram.nic.in/ |
| WA | Warangal | Warangal | 3522644.0 | 12846.0 | 252.0 | http://warangal.nic.in/ |
Question:
What is the abbreviation of the district of Mahbubnagar?
Answer:
MA