l, r = map(int, input().split())
print("YES")
for i in range(l, r, 2):
print(i, i+1)
#include<bits/stdc++.h>
using namespace std;
int main()
{
long long int l,r;
cin>>l>>r;
cout<<"YES"<<endl;
for(long long int i=l;i<=r;i+=2)
{
cout<<i<<" "<<i+1<<endl;
}
}
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