Problem: Karan's mathematics professor has given him a lots of homework. Since he is busy preparing for September Easy Challenge, he needs your help.

Given two numbers, find the sum of prime numbers between them, both inclusive. 

Input:

The first line contains the number of test cases T. Each test case contains two space separated integers.

Output:

Print the answer on a new line for each case.

Constraints:

1 ≤ T ≤ 100

1 ≤ a,b < 10^6

SAMPLE INPUT
1
1 5

SAMPLE OUTPUT
10

Solution (in PYTHON):

Solution:
import math
for _ in xrange(input()):
    c=0
    a,b=map(int,raw_input().split())
    if a==1:
        a=2
    else:
        a=a
    for num in range(a,b+1):
        if all(num%i!=0 for i in xrange(2,int(math.sqrt(num))+1)):
           c+=num
    print c