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
import random
t=int(raw_input())

def isprime(n):
	if n==2:
		return True
	if n&1==0 or n==1:
		return False
	for i in xrange(2,int(math.sqrt(n))+1):
		if n%i==0:
			return False
	return True
while t>0:
	t-=1
	a,b=map(int, raw_input().split())
	total=0
	for x in xrange(a,b+1):
		if isprime(x):
			total+=x
	print total