static void Hain(string[] args){
//m≤n
string str = Console.ReadLine();
string[] strArray = str.Split("");
int[] intArray =new int[strArray.Length];
for (int j =0; j< strArray.Length; j++){
int number= Convert.Toint32(strArray[j];
intArray[j] = number;
}
int m = intArray[0];
int n = intArray[1];
for(int i =m;i<n+1;i++)// m -n range
{
bool isSu = true;
for(int j=2;j<i;j++)// 2~i-1
{
if(i %j ==0)
{
isSu = false;
break;
}
}
if (isSu)
{
int temp = i;
int number = 0;
while ( temp %10 !=0)//余数不等于0
{
number = number*10+temp%10;
temp = temp /10;
}
bool isSuFan = true;
for(int j=2;j<number;j++)
{
if(number %j ==0)
{
isSuFan = false;
break;
}
}
if(isSuFan == true)
{
Console .write( number);
}
}
}