## MSE08G - Another Lucky Numbers

 English Vietnamese

John has recently arrived in Bucharest for the South Eastern European Regional Contest. John is famous for his theory of lucky numbers. That’s why all the contestants and spectators are very happy. According to that theory 4 and 7 are lucky digits, and all the other digits are not lucky. A lucky number is a number that contains only lucky digits in decimal notation. A very lucky number is a number that can be expressed as a product of several lucky numbers. A lucky number by itself is considered to be very lucky. For example, numbers 47, 49, 112 are very lucky.

Your task is to calculate the number of very lucky numbers that are not less than A and not greater than B. Of course, numbers A and B are given by John.

### Input

The first line of the input contains a single integer T – a number of test cases. Each of the next T lines contains two integers separated by a single space – A and B.

### Output

Output must contain T lines – answers for the test cases.

### Constraints:

1 ≤ T ≤ 7777,

1 ≤ A ≤ B ≤ 1000000000000 (10^12).

### Sample

```Input :
4
1 2
88 99
112 112
1 100

Output:
0
0
1
10
```

Hint: Very lucky numbers for the last case are 4, 7, 16, 28, 44, 47, 49, 64, 74 and 77.

 Được gửi lên bởi: psetter Ngày: 2009-04-10 Thời gian chạy: 1s-1.018s Giới hạn mã nguồn: 50000B Memory limit: 1536MB Cluster: Cube (Intel G860) Ngôn ngữ cho phép: Tất cả ngoại trừ: ERL GOSU JS-RHINO NODEJS PERL6 PYPY RUST SED VB.NET Nguồn bài: Southeastern European 2008