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#include <iostream>
#include <vector>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int cases;
    cin >> cases;

    while (cases--)
    {
        int n;
        cin >> n;

        string startColors, endColors;
        cin >> startColors >> endColors;

        vector<int>* neighbors = new vector<int>[n]();

        int a, b;
        for (int i = 0; i < n - 1; i++)
        {
            cin >> a >> b;
            a--;
            b--;

            neighbors[a].push_back(b);
            neighbors[b].push_back(a);
        }

        //

        if(startColors == endColors)
        {
            cout << "TAK\n";
            continue;
        }

        char prev = 'x';
        bool foundDif = false;
        for (auto it : startColors)
        {
            if (prev != 'x' && it != prev)
            {
                foundDif = true;
                break;
            }

            prev = it;
        }

        if (!foundDif)
        {
            cout << "NIE\n";
            continue;
        }

        int maxDegree = -1;

        for (int i = 0; i < n; i++)
        {
            int degree = neighbors[i].size();

            if (degree > maxDegree)
                maxDegree = degree;
        }

        if (maxDegree > 2)
        {
            //check if end is fully alternating
            bool alternating = true;
            for (int i = 0; i < n; i++)
            {
                for (auto it : neighbors[i])
                {
                    if (endColors[i] == endColors[it])
                        alternating = false;
                }
            }

            if (alternating)
            {
                cout << "NIE\n";
                continue;
            }
            else
            {
                cout << "TAK\n";
                continue;
            }
        }
        else
        {
            //its a snake
            int startingNode = 0;
            for (int i = 0; i < n; i++)
            {
                if (neighbors[i].size() == 1)
                {
                    startingNode = i;
                    break;
                }
            }

            char endStartingColor = endColors[startingNode];
            int endSwaps = 0;

            char startStartingColor = startColors[startingNode];
            int startSwaps = 0;

            int prevNode = -1;
            int currentNode = startingNode;

            while (true)
            {
                int nextPrev = currentNode;
                for (auto it : neighbors[currentNode])
                {
                    if (it != prevNode)
                    {
                        currentNode = it;
                    }
                }
                prevNode = nextPrev;

                if (prevNode == currentNode)
                    break;

                if (endColors[currentNode] != endColors[prevNode])
                {
                    endSwaps++;
                }

                if (startColors[currentNode] != startColors[prevNode])
                {
                    startSwaps++;
                }
            }

            if (startStartingColor != endStartingColor)
                startSwaps--;

            if (startSwaps >= endSwaps)
            {
                cout << "TAK\n";
            }
            else
            {
                cout << "NIE\n";
            }
        }

    }
}