Question
What are the missing numbers?
3317, 3337, (a)         , 3377, (b)         , 3417
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

What are the missing numbers?
3317, 3337, (a)         , 3377, (b)         , 3417