#include <iostream>

using namespace std;

int main()
{
    int n,H,M,a=0;
    cin>>n;
    while (a<n){
        cin>>H;cout<<":";cin>>M;
        a++;
    }
    if(H>24)
        cout<<"NO"<<endl;
    if(H<0)
        cout<<"NO"<<endl;
    if(M>60)
        cout<<"NO"<<endl;
    if(M<0)
        cout<<"NO"<<endl;
    if(H=M)
        cout<<"YES"<<endl;
    if(M==00)
        cout<<"YES"<<endl;
    if(M-H==22)
        cout<<"YES"<<endl;
    else
        cout<<"NO"<<endl;
    return 0;
}