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#include <iostream>
#include <fstream>
using namespace std;
ifstream ci ("difprim.in");
ofstream co ("difprim.out");
int main()
{
long long a,b,max=0,a1=0,a2=0;
// ci >> a >> b;
a=999;
b=10000000;
long long v[b+2];
for (int i=2; i<=b; i++)
{
v[i]=1;
}
/*
for (int i=2; i<=b; i++)
{
if (v[i]==1)
for (int j=i+i; j<=b; j=j+i)
{
v[j]=0;
}
}
/*for (int i=a; i<=b; i++)
{
if (v[i]==1)
{
for (int j=i+1; j<=b; j++)
{
if (v[j]==1)
{
if (j-i>max)
{
max=j-i;
a1=i;
a2=j;
}
break;
}
}
}
}*/
co << a1 << " " << a2;
return 0;
}