var grid = require("fs").readFileSync("input.txt").toString().split("\n").map((a)=>(a.split("")));
var x = 163;
var y = 0;
var dirs = [[0, 1], [1, 0], [-1, 0], [0, -1]];
var dir = 0;
var visited = [];
var end = false;
var letters = [];
while(!end){
	if(grid[y][x].match("[A-Z]")){
		letters.push(grid[y][x]);
	}
	visited.push((y*201) + x);
	if(grid[y][x] == "+"){
		var changed = false;
		var i = 0;
		while(!changed){
			if(visited.indexOf(((y + dirs[i][1]) * 201) + (x + dirs[i][0])) == -1){
				//not visited before
				if(grid[y+dirs[i][1]][x+dirs[i][0]] != " "){
					//not empty
					changed = true;
					dir = i;
				}
			}
			i++;
		}
	}
	x += dirs[dir][0];
	y += dirs[dir][1];
	if(grid[y][x] == " "){
		end = true;
	}
}
console.log(letters.join(""));