1st - first, 2nd - second, 3rd - third, 4th - fourth, 5th - fifth, 6th - sixth, 7th - seventh, 8th - eighth, 9th - ninth, 10th - tenth, 11th - eleventh, 12th - twelfth, 13th - thirteenth, 14th - fourteenth, 15th - fifteenth, 16th - sixteenth, 17th - seventeenth, 18th - eighteenth, 19th - nineteenth, 20th - twentieth,

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