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0 - 10

0 zero 6 six
1 one 7 seven
2 two 8 eight
3 three 9 nine
4 four 10 ten
5 five    

11 - 20

11 eleven 16 sixteen
12 twelve 17 seventeen
13 thirteen 18 eighteen
14 fourteen 19 nineteen
15 fifteen 20 twenty

21 - 30

21 twenty-one 26 twenty-six
22 twenty-two 27 twenty-seven
23 twenty-three 28 twenty-eight
24 twenty-four 29 twenty-nine
25 twenty-five 30 thirty

Exercises