#include <iostream>

using namespace std;

int main()
{
    int n,x,z;
    cin>>n;
    while(n>0){
    cin>>x;
    cout<<":";
    cin>>z;
    if(z/10==0&&z%10==0)cout<<"YES";
    else if(x/10==z/10&&x%10==z%10)cout<<"YES";
    else if(x/10==z%10&&x%10==z/10)cout<<"YES";
    else if(x==(x%10)+1&&(x%10)==z+1&&z==(z%10)+1)cout<<"YES";
    else cout<<"NO";
    n--;}
    return 0;
}