'''
Don't Copy This Code, Try To Solve It By Yourself
'''
def Solve():
for t in range(int(input())):
dict_={}
for n in range(int(input())):
b, d = map(int, input().split())
if d not in dict_.keys():
dict_[d]=[b]
else:
dict_[d].append(b)
if len(dict_.keys()) != 10:
print("MOREPROBLEMS")
else:
Sum=0
for value in dict_.values():
Sum+=max(value)
print(Sum)
if __name__ == "__main__":
Solve()#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_multiset;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
#define ll long long int
#define forn(i, n) for (int i = 0; i < int(n); i++)
#define cin(arr,n) for(int i=0; i<n;i++){cin>>arr[i];}
#define endl "\n"
#define cin1(vec,n) forn(i,n){ll x;cin>>x;vec.push_back(x);}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
ll t;
cin>>t;
while(t--){
ll n;
cin>>n;
map<ll,ll>mp;
for(int i=0;i<n;i++){
ll x,y;
cin>>x>>y;
if(mp[y]<=x){
mp[y]=x;
}
}
ll ct=0;
ll ans=0;
for(auto it:mp){
ans+=(it.second);
ct++;
}
if(ct<10){
cout<<"MOREPROBLEMS"<<endl;
}
else{
cout<<ans<<endl;
}
}
return 0;
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