Read the number
12
Twelve
15
Fifteen
11+15
23
Before 20
19
27
Twenty-seven
23
Twenty-three
14+23
After 33
34
34
Thirty-four
31
Thirty-one
16+28
44
Before 45
44
48
Forty-eight
46
Forty-six
19+34
53
After 56
57
59
Fifty-nine
58
Fifty-eight
15+45
60
Before 60
59