Count the Magical Number
Problem
A number is called magical number if it consist of number no other than (3, 7). You need to find the total magic number X between L and U.
The first few magical numbers are (3, 7, 33, 37, 73……)
Input
The first line of input contains the only integer T denoting the number of testcases.
Second line contains contains two integers L and U.
Output
Print the total magic number X between L and U.
Constraints
1 ≤ T ≤ 105
0 ≤ L, U ≤ 1016
Time Limit: 1
Memory Limit: 256
Source Limit:
Explanation
For 4th Test Case their are 6 magic number between 0 and 100
3,7,33,37,73,77
