回文素数

a = int(input())
b = []   
n = 1     
while len(b) < a:  
    n = n+1    
    if str(n) == str(n)[::-1]:   
        for i in range(1,n):    
            if n % i == 0:
                x = i           
        else:
            if x == 1:     
                b.append(str(n)) 
print("{}".format(" ".join(b)),end=" ")