#include <cstdio>

int T,n,a[51][51],l[51];
int read(){
    int x=0;
    char ch=getchar();
    while(ch<'0'||ch>'9')ch=getchar();
    while(ch>='0'&&ch<='9')x=x*10+ch-'0',ch=getchar();
    return x;
}
bool vis[51];
int main(){
    scanf("%d",&T);
    for(int fd=1;fd<=T;++fd){
        scanf("%d",&n);
        int L;
        for(int i=1;i<=n;++i){
            scanf("%d",l+i);
            if(l[i])L=i;
        }
        for(int i=1;i<=n;++i)
            for(int j=1;j<=n;++j)
                a[i][j]=read();
        for(int i=1;i<=n;++i)vis[i]=0;
        bool ans=1;
        for(int i=1,j=a[L][1];i<n-1;++i){
            vis[j]=1;
            if(j==L){
                ans=0;
                break;
            }
            for(int k=1;k<=n;++k)
                if(!vis[a[j][k]]){
                    j=a[j][k];
                    break;
                }
        }
        if(!ans)puts("lieren");
        else puts("langren");
    }
}