#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int a[n];
    for(int i=0;i<n;i++) cin>>a[i];
    vector<int> v={2,2,1,2,2,2,1,2,2,2,1,3,3,3,4,3};//upto 15
    vector<int> tens={2,1,1,1,2,1,1,2,2,2,2,2};
    int dig=0;
    for(int i=0;i<n;i++)
    {
        if(a[i]<=15) dig+=v[a[i]];
        else if(a[i]%10==0) dig+=tens[(a[i]/10)];
        else
        {
            if(a[i]<20) dig+=v[a[i]-10];
            else dig+=v[a[i]%10]+tens[a[i]/10];
        }
    }
    int ans=0;
    for(int i=0;i<n;i++)
    {
        for(int j=i+1;j<n;j++) if(a[i]+a[j]==dig) ans++;
    }
    vector<string> s={"zero","one","two","three","four","five","six","seven","eight","nine","ten", "eleven", "twelve",
                               "thirteen", "fourteen",
                               "fifteen", "sixteen",
                               "seventeen", "eighteen", "nineteen"};
    vector<string> ten={"zero","ten","twenty", "thirty", "forty", "fifty",
                            "sixty", "seventy", "eighty", "ninety","hundred"};
    if(ans<=19) cout<<s[ans];
    else if(ans%10==0) cout<<ten[ans/10];
    else cout<<ten[ans/10]<<s[ans%10];
    return 0;
}