ddd

import random
b = []
for a in range(100):
    int = random.randint(1,100)
    b.append(a)

m = 0
c = []
i = 2
s = 1
d = 0

for a in b:
    while s == 1 and i <= a // 2 and i <= (a // 10 + (a % 10) * 10) // 2:
        if a % i == 0 or (a // 10 + (a % 10) * 10) % i == 0:
            s = 0
        else:
            i += 1
    if s == 1:
        d += 1
print(d)