twenty-nine, 21+8, thirty, 13+17, twenty-eight, 14+14, twenty-seven, 28-1, twenty-six, 3+23, twenty-five, 30-5, twenty-four, 12+12, twenty-three, 15+8, twenty-two, 11+11, twenty-one, 17-6, twenty, 10+10, nineteen, 9+3+7, eighteen, 9+9, seventeen, 12+5, sixteen, 28-12, fifteen, 7+8, fourteen, 29-15, thirteen, 21-8, twelve, 4+8, eleven, 30-19.

adding numbers

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