#include<iostream>

#include<cstdio>

#include<algorithm>

#include<cstdlib>

#include<cstring>

#include<string>

#include<cmath>

#include<map>

#include<set>

#include<vector>

#include<queue>

#include<bitset>

#include<ctime>

#include<deque>

#include<stack>

#include<functional>

#include<sstream>

//#include<cctype>

//#pragma GCC optimize(2)

using namespace std;

#define maxn 400005

#define inf 0x7fffffff

//#define INF 1e18

#define rdint(x) scanf("%d",&x)

#define rdllt(x) scanf("%lld",&x)

#define rdult(x) scanf("%lu",&x)

#define rdlf(x) scanf("%lf",&x)

#define rdstr(x) scanf("%s",x)

typedef long long  ll;

typedef unsigned long long ull;

typedef unsigned int U;

#define ms(x) memset((x),0,sizeof(x))

const long long int mod = 1e9;

#define Mod 1000000000

#define sq(x) (x)*(x)

#define eps 1e-11

typedef pair<int, int> pii;

#define pi acos(-1.0)

//const int N = 1005;

#define REP(i,n) for(int i=0;i<(n);i++)

typedef pair<int, int> pii;

inline int rd() {

	int x = 0;

	char c = getchar();

	bool f = false;

	while (!isdigit(c)) {

		if (c == '-') f = true;

		c = getchar();

	}

	while (isdigit(c)) {

		x = (x << 1) + (x << 3) + (c ^ 48);

		c = getchar();

	}

	return f ? -x : x;

}

ll gcd(ll a, ll b) {

	return b == 0 ? a : gcd(b, a%b);

}

int sqr(int x) { return x * x; }

/*ll ans;

ll exgcd(ll a, ll b, ll &x, ll &y) {

	if (!b) {

		x = 1; y = 0; return a;

	}

	ans = exgcd(b, a%b, x, y);

	ll t = x; x = y; y = t - a / b * y;

	return ans;

}

*/

int T;

vector<int>vc[maxn];

int ans;

int a[maxn];

void dfs(int u,int fa,int dep){

	for(int i=0;i<vc[u].size();i++){

		int v=vc[u][i];

		if((dep+1)%2)ans^=a[v];

		dfs(v,u,dep+1);

	}

}

int main() {

	T=rd();

	while(T--){

		int n;rdint(n);

		for(int i=0;i<=n;i++)vc[i].clear();

		for(int i=1;i<n;i++){

			int fa;rdint(fa);

			vc[fa].push_back(i);

		}

		ans=0;

		for(int i=0;i<n;i++)rdint(a[i]);

		dfs(0,0,0);

		if(ans)cout<<"win"<<endl;

		else cout<<"lose"<<endl;

	}

}