#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,j;
	int x,y;
	cin>>i>>j;
	cin>>x>>y;
	int t;
	cin>>t;
	int ans=0;
	while(t--)
	{
		char ch;
		cin>>ch;
		ans++;
		if(ch=='N'&&i<x) i++;
		if(ch=='S'&&i>x) i--;
		if(ch=='E'&&j<y) j++;
		if(ch=='W'&&j>y) j--;
		if(i==x&&j==y)
		{
			cout<<ans;
			return 0;
		}
	}
	cout<<-1;
	return 0;
}