#!/usr/bin/env python
import sys

T=10 #no of test cases
t=open(sys.argv[1],'r').readlines()

def sieve(maxNum):
    yield 2
    D, q = {}, 3
    while q <= maxNum:
        p = D.pop(q, 0)
        if p:
            x = q + p
            while x in D: x += p
            D[x] = p
        else:
            yield q
            D[q*q] = 2*q
        q += 2
    raise StopIteration

def is_prime(n): # sieve of eratosthenes
    ps, sieve = [], [True] * (n + 1)
    for p in range(2, n + 1):
        if sieve[p]:
           ps.append(p)
           for i in range(p * p, n + 1, p):
               sieve[i] = False
    return ps

#first line of each test case
a=[1,4,7,10,13,16,19,22,25,28]
count=0
for i in a:

    b=t[i].split(" ")
    c=b[1].split("\n")[0]
    b=b[0]

    for k in xrange(int(b)):
        d=t[i+1].split(" ")

        e=t[i+2].split(" ")
        for g in d:
            for j in e:
                try:
                    sum=int(g)+int(j)
                    p=is_prime(sum)
                    if p==True:
                        count+=1
                        print count
                    else:
                        pass
                except:
                    try:
                        g=g.strip("\n")
                        sum=int(g)+int(j)
                                            p=is_prime(sum)
                                            if p==True:
                                                    count+=1
                                                    print count
                                            else:
                                                    pass
                    except:
                        j=j.strip("\n")
                        sum=int(g)+int(j)
                                            p=is_prime(sum)
                                            if p==True:
                                                    count+=1
                                                    print count
                                            else:
                                                    pass


print "Final count"+count