string testData =
        "#################\n"
        "#---------------#\n"
        "#---------#-----#\n"
        "#---------#-----#\n"
        "#---o-----------#\n"
        "#------#--------#\n"
        "#---------------#\n"
        "#################\n";
    string resultData =
        "#################\n"
        "#+++++++++++++++#\n"
        "#+++++++++#+++++#\n"
        "#+++++++++#+++++#\n"
        "#+++++++++++++++#\n"
        "#++++++#++++++++#\n"
        "#+++++++++++++++#\n"
        "#################\n";