#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
    double sum = 0, num = 0;
    for (int i = 0; i < 3; i++)
    {
        cin >> a[i];
        sum += a[i];
    }
    sum /= 3;
    if (sum >= 90)
    {
        for (int i = 0; i < 3; i++)
        {
            if (a[i] >= 90)
            {
                num++;
            }
        }
        if (num == 3)
        {
            cout << "beijing" << endl;
        }
        else if (num == 2)
        {
            cout << "xiamen" << endl;
        }
        else if (num == 1)
        {
            cout << "guilin" << endl;
        }
    }
    else if (sum >=85)
    {
        if(a[0] >= 85 && a[1] >= 85 && a[2] >= 85)
        {
            cout << "shanghai" << endl;
        }
        else
        {
            cout << "nanjing" << endl;
        }
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
    double sum = 0, num = 0;
    for (int i = 0; i < 3; i++)
    {
        cin >> a[i];
        sum += a[i];
    }
    sum /= 3;
    if (sum >= 90)
    {
        for (int i = 0; i < 3; i++)
        {
            if (a[i] >= 90)
            {
                num++;
            }
        }
        if (num == 3)
        {
            cout << "beijing" << endl;
        }
        else if (num == 2)
        {
            cout << "xiamen" << endl;
        }
        else if (num == 1)
        {
            cout << "guilin" << endl;
        }
    }
    else if (sum >=85)
    {
        if(a[0] >= 85 && a[1] >= 85 && a[2] >= 85)
        {
            cout << "shanghai" << endl;
        }
        else
        {
            cout << "nanjing" << endl;
        }
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
    double sum = 0, num = 0;
    for (int i = 0; i < 3; i++)
    {
        cin >> a[i];
        sum += a[i];
    }
    sum /= 3;
    if (sum >= 90)
    {
        for (int i = 0; i < 3; i++)
        {
            if (a[i] >= 90)
            {
                num++;
            }
        }
        if (num == 3)
        {
            cout << "beijing" << endl;
        }
        else if (num == 2)
        {
            cout << "xiamen" << endl;
        }
        else if (num == 1)
        {
            cout << "guilin" << endl;
        }
    }
    else if (sum >=85)
    {
        if(a[0] >= 85 && a[1] >= 85 && a[2] >= 85)
        {
            cout << "shanghai" << endl;
        }
        else
        {
            cout << "nanjing" << endl;
        }
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
    double sum = 0, num = 0;
    for (int i = 0; i < 3; i++)
    {
        cin >> a[i];
        sum += a[i];
    }
    sum /= 3;
    if (sum >= 90)
    {
        for (int i = 0; i < 3; i++)
        {
            if (a[i] >= 90)
            {
                num++;
            }
        }
        if (num == 3)
        {
            cout << "beijing" << endl;
        }
        else if (num == 2)
        {
            cout << "xiamen" << endl;
        }
        else if (num == 1)
        {
            cout << "guilin" << endl;
        }
    }
    else if (sum >=85)
    {
        if(a[0] >= 85 && a[1] >= 85 && a[2] >= 85)
        {
            cout << "shanghai" << endl;
        }
        else
        {
            cout << "nanjing" << endl;
        }
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a[7],sum=0;
    for (int i=1;i<=3;i++)
    {
        cin>>a[i];
        if (a[i]>=90)
            sum++;
    }
    if (a[1]+a[2]+a[3]>=270)
    {
        if (sum==3)
            cout<<"beijing";
        else if (sum==2)
            cout<<"xiamen";
        else if (sum==1)
            cout<<"guilin";
    }
    else if (a[1]+a[2]+a[3]>=255)
        if (a[1]>=85&&a[2]>=85&&a[3]>=85)
            cout<<"shanghai";
        else
            cout<<"nanjing";
    return 0;
}