private String save() {
        String result = new String();
        for (int x = 0; x < fields.length; x++) {
            for (int y = 0; y < fields[x].length; y++) {
                for (int z = 0; z < fields[x][y].length; z++) {
                    result += fields[x][y][z];
                }
                if (y < fields[x].length - 1) {
                    result += ',';
                }
            }
            if (x < fields.length - 1) {
                result += '/';
            }
        }
        return result;
    }