Acronyms Profound! Representation Organic! Novel / Yare Mnemonics! Self-evident!
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| OA to ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, ELEVEN, TWELVE, THIRTEEN, FOURTEEN, FIFTEEN, SIXTEEN, SEVENTEEN, EIGHTEEN, NINETEEN, TWENTY |
| ONLINE SUPPORT to OZONE LAYER |