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*AD* *AE* *AF* *AG* *AI* *AL* *AM* *AN* *AO* *AR* *AT* *AU* *AW* *AZ*
*BA* *BB* *BD* *BE* *BF* *BG* *BH* *BI* *BJ* *BM* *BN* *BO* *BR* *BS* *BT* *BW* *BY* *BZ*
*CA* *CD* *CF* *CG* *CH* *CI* *CK* *CL* *CM* *CN* *CO* *CR* *CS* *CU* *CV* *CY* *CZ*
*DE* *DJ* *DK* *DM* *DO* *DZ*
*EC* *EE* *EG* *ES* *ET*
*FI* *FJ* *FK* *FM* *FO* *FR*
*GA* *GD* *GE* *GH* *GI* *GL* *GM* *GN* *GQ* *GR* *GT* *GW* *GY*
*HK* *HN* *HR* *HT* *HU*
*ID* *IE* *IL* *IN* *IQ* *IR* *IS* *IT*
*JM* *JO* *JP*
*KE* *KG* *KH* *KI* *KM* *KN* *KP* *KR* *KW* *KY* *KZ*
*LA* *LB* *LC* *LI* *LK* *LR* *LS* *LT* *LU* *LV* *LY*
*MA* *MC* *MD* *MG* *MK* *ML* *MM* *MN* *MO* *MR* *MS* *MT* *MU* *MV* *MW* *MX* *MY* *MZ*
*NA* *NC* *NE* *NG* *NI* *NL* *NO* *NZ*
*OM*
*PA* *PE* *PF* *PG* *PH* *PK* *PL* *PM* *PR* *PT* *PW* *PY*
*QA*
*RE* *RO* *RU* *RW*
*SA* *SB* *SC* *SD* *SE* *SG* *SI* *SK* *SL* *SM* *SN* *SO* *SR* *ST* *SV* *SY* *SZ*
*TC* *TD* *TG* *TH* *TJ* *TL* *TM* *TN* *TO* *TR* *TT* *TW* *TZ*
*UA* *UG* *UK* *US* *UY* *UZ*
*VC* *VE* *VG* *VN* *VU*
*WS*
*YE*
*ZA* *ZM* *ZW*
They are some acronym of country name. :)
