#include <iostream>
#include <stdio.h>
using namespace std;

int countDigits(int num)
{
    int cnt=0;
    while (num>0)
    {
        num = num / 10;
        cnt++;
    }
    return (cnt);
}

bool HappyChet(int num, int numLen)
{
    int     j, n1 = 0, n2 = 0;

    for (j=0; j<numLen; j++)
    {
        if (j >= numLen/2)
            n1 += num % 10;

       else
            n2 += num % 10;
        num = num / 10;
    }

    return n1==n2;
}

bool HappyNechet(int num, int numLen)
{
    int     j, n1 = 0, n2 = 0;

    for (j=0; j<numLen; j++)
    {
        if (j >= (numLen+1)/2)
            n1 += num % 10;

       else
            n2 += num % 10;
        num = num / 10;
    }

    return n1==n2;
}


int main(int argc, char* argv[])
{
bool *n;
int len =0;
int x=0,y=0;
if(argc <2)
{
 cerr<<"Wgong argument"<<endl;
 return(0);
}
sscanf(argv[1], "%d-%d", &x, &y);
if((x<0) || (x>y) || (x==y))
 { cout<<"Wrong range"<<endl;
   return(-1);
 }
for (int i=2;i<=y;i++) {
     n[i] = true;
}
for (int i=2;i<=y;i++) {
     if (n[i] == true) {
         for (int j=i*i;j<=y;j+=i)
             n[j] = false;
    }
}
for (int i=x; i<=y;i++) {
  if (n[i] == true)
     { len = countDigits(i);
       if  (len % 2 == 0)
       {
        if (HappyChet(i, len))
               cerr << i << endl;}
        }
}
for(int i=x; i<=y;i++) {
  if (n[i] == true)
     { len = countDigits(i);
       if  (len % 2 != 0)
       {
        if (HappyNechet(i, len))
               cerr << i << endl;}
        }
}
return(0);
}