C++ :

#include<bits/stdc++.h>
using namespace std;
string a,x;
int r,n;
string name[10]={"White", "Green", "Peacock", "Plum", "Scarlett", "Mustard"};
string room[10]={ "Hall", "Hall","Hall","Hall","Hall","Hall","Hall","Hall"};
int main()
{
	int etime;
	string ename,eroom;
	cin>>a>>r>>n;
	for(int i=0;i<n;i++)
	{
		cin>>etime>>ename>>eroom;
		if(etime<=r)
		{
			for(int j=0;j<6;j++)
			{
				if(name[j]==ename)
					room[j]=eroom;
			}
		}
	}
	int ans=0;
	for(int i=0;i<6;i++)
	{
		if(room[i]==a)
		{
			x=name[i];
			ans++;
		}
	}
	if(ans==1) cout<<x;
	else cout<<-1;
	return 0; 
}
/*
Library 10
3
5 Plum Library
7 Scarlett Library 
9 Plum Cellar
*/