#include <cstdio>
#include <cctype>
#define N_MAX 100000
inline int I()
{
    register int c = getchar(), x = 0;
    for (;!isdigit(c); c = getchar());
    for (; isdigit(c); c = getchar()) x = x * 10 - '0' + c;
    return x;
}
int T, n, i, x, a[N_MAX], d[N_MAX], f[N_MAX];
int main()
{
    for (T = I(); T; --T)
    {
        n = I();
        for (i = 1; i < n; ++i)
            d[i] = d[f[i] = I()] ^ 1;
        for (i = 0; i < n; ++i)
            a[i] = I();
        x = 0;
        for (i = 0; i < n; ++i)
            if (d[i])
                x ^= a[i];
        puts(x ? "win" : "lose");
    }
    return 0;
}