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80 A.cpp
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/**
* Git >> Mohsin_Riad
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**/
#include<bits/stdc++.h>
using namespace std;
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define mx 1000
#define endl "\n"
#define pb push_back
#define pob pop_back
typedef long long ll;
typedef double dd;
const int N = 1e5;
static int n, m;
int main()
{
IOS
cin>>n>>m;
if(n==2)
if(m==3) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==3)
if(m==5) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==5)
if(m==7) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==7)
if(m==11) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==11)
if(m==13) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==13)
if(m==17) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==17)
if(m==19) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==19)
if(m==23) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==23)
if(m==29) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==29)
if(m==31) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==31)
if(m==37) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==37)
if(m==41) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==41)
if(m==43) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==43)
if(m==47) cout<<"YES"<<endl;
else cout<<"NO"<<endl;
if(n==47) cout<<"NO"<<endl;
return (0);
}