#include <iostream>
using namespace std;
int main() {
int n;
cin>>n;
for(int i = 0; i < n; i++){
int a,b;
cin>>a>>b;
if(b==a+2||a==b+2||((a%2==1)&&(b==a+1))||((b%2==1)&&(a==b+1))) cout<<"YES"<<"\n";
else cout<<"NO"<<"\n";
}
return 0;
}
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