bob

process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function main() {
    var q = parseInt(readLine());
    for(var a0 = 0; a0 < q; a0++){
        var n = parseInt(readLine());
        var board = [];
        for(var board_i = 0; board_i < n; board_i++){
            board.push([]);
            var elem = readLine().split('');
            for(var i = 0; i < elem.length; i++){
                board[board_i].push(elem[i]);
            }
        }
        
        var wins = firstMove(board);
        if(wins > 0){
            console.log("WIN " + wins)
        }else{
            console.log("LOSE");
        }
        
        //console.log(board);
        //console.log(doMove(board, {x:1,y:1}, {y:0,x:0}));
        //console.log(firstMove(board));
        
        // Write Your Code Here
        //console.log(possibleMoves(board, {y: 1, x: 1}));
        //console.log(board);
    }
}

function firstMove(board){
    var board = JSON.parse(JSON.stringify(board));

    var wins = 0;
    var kings = getKings(board);
    for(var i = 0; i < kings.length; i++){
        
        var moves = possibleMoves(board, kings[i], 0);
        //console.log("Kings");
       // console.log(kings[i]);
       // console.log(moves);
        
        if(moves.length > 0){
            for(var j = 0; j < moves.length; j++){
               //console.log("Checking initial move: " + JSON.stringify(moves[j]));
               if(move(doMove(board, kings[i], moves[j]), 1)){
                    wins++;
               }
            }
        }
    }
    
    return wins;
}

var move = function m(board, time){
   // console.log(time);
    var board = JSON.parse(JSON.stringify(board));
    var kings = getKings(board);
   // console.log("init");
   // console.log(board);
    for(var i = 0; i < kings.length; i++){
        var moves = possibleMoves(board, kings[i], time);
       // console.log(JSON.stringify(moves) + ": " + moves.length);
        if(moves.length > 0){
            for(var j = 0; j < moves.length; j++){
              //  console.log("executed");
                var newBoard = doMove(board, kings[i], moves[j])
               // console.log(newBoard);
               return move(newBoard, ++time);
            }
        }else if(time % 2 == 0){
            return false;
        }else{
            return true;
        }
    }
}


function getKings(board){
    var board = JSON.parse(JSON.stringify(board));
    var kings = [];
    for(var i = 0; i < board.length; i++){
        for(var j = 0; j < board[i].length; j++){
            if(board[i][j].includes('K')){
                for(var k = 0; k < board[i][j].length; k++){
                    kings.push({y:i, x:j});
                }
            }
            
        }
    }
    return kings;
}

function doMove(board, oldKing, newKing){
    var board = JSON.parse(JSON.stringify(board));

    var kings = board[oldKing.y][oldKing.x];
    if(kings.length == 1){
        board[oldKing.y][oldKing.x] = '.';
    }else{
        board[oldKing.y][oldKing.x] = kings.substring(0, kings.length - 1);
    }
    
    if(board[newKing.y][newKing.x] == '.'){
        board[newKing.y][newKing.x] = 'K';
    }else{
        board[newKing.y][newKing.x] += 'K';
    }
    
    return board;
}



function possibleMoves(board, king, time){
    var board = JSON.parse(JSON.stringify(board));
    var returnMoves = [];
    if(inBounds(board, {y: king.y - 1, x: king.x})){
        if(board[king.y - 1][king.x] != 'X'){
            returnMoves.push({y: king.y - 1, x: king.x});
        }
    }
   
    if(inBounds(board, {y: king.y, x: king.x - 1})){
        if(board[king.y][king.x - 1] != 'X'){
            returnMoves.push({y: king.y, x: king.x - 1});
        }
    }
    
    if(inBounds(board, {y: king.y - 1, x: king.x - 1})){
        if(board[king.y - 1][king.x - 1] != 'X'){
            returnMoves.push({y: king.y - 1, x: king.x - 1});
        }
    }
    
   // console.log(returnMoves);
    return returnMoves;
}

function inBounds(board, king){
    var board = JSON.parse(JSON.stringify(board));

    if(king.y < 0 || king.x < 0){
        return false;
    }
    if(king.y < board.length && king.x < board[king.y].length){
        return true;
    }else{
        return false;
    }
}