Real world company prefixes

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O& O2 O3 O4 O5 O6 O7 O8 O9 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OO OP OQ OR OS OT OU OV OW OX OY OZ

OTA OTB OTC OTD OTE OTF OTG OTH OTI OTJ OTK OTL OTM OTN OTO OTP OTQ OTR OTS OTT OTU OTV OTW OTX OTY OTZ

OTNB OTNC OTNG OTNS OTNU