Problem Statement:

Let f(x) be the product of digits of a number.

Given L and R, find the number of values of 'i' such that L <= i <= R and f(i) is even.

Input:

The first line consists of an integer t, the number of test cases. For each test case, you are given the two integers L and R.

Output:

For each test case, print the number of values of 'i' such that L <= i <= R and f(i) is even.

Input Constraints:

1 <= t <= 100

1   <=  L   <=  R   <=  1000000000

Sample Input:

2

2 12

4 23

Sample Output:

6

12